One of the autosomal loci controlling eye color in fruit flies has two alleles: one for brown eyes and the other for red eyes. Fruit flies from a true-breeding line with brown eyes were crossed with flies from a true-breeding line with red eyes. The F 1 flies had red eyes. What conclusion can be drawn from this experiment? (a) these alleles underwent independent assortment (b) these alleles underwent segregation (c) these genes are X-linked (d) the allele for red eyes is dominant to the allele for brown eyes (e) all the preceding are true

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 11, Problem 1TYU

One of the autosomal loci controlling eye color in fruit flies has two alleles: one for brown eyes and the other for red eyes. Fruit flies from a true-breeding line with brown eyes were crossed with flies from a true-breeding line with red eyes. The F₁ flies had red eyes. What conclusion can be drawn from this experiment? (a) these alleles underwent independent assortment (b) these alleles underwent segregation (c) these genes are X-linked (d) the allele for red eyes is dominant to the allele for brown eyes (e) all the preceding are true

Expert Solution & Answer

Summary Introduction

Introduction: Locus (pl:loci) is the specific location of the gene in the chromosome. Alleles are variants of a gene. The allele that masks the expression of the other allele in heterozygous form is called the dominant allele.

Answer to Problem 1TYU

Correct answer: When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 had red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Explanation of Solution

Reason for the correct answer.

When true breeding parents are crossed where one parent is homozygous for one allele and the other parent is homozygous for another allele, the trait expressed in the F1 generation is the dominant allele. When applying the above principle for the given question, where fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes. This shows that the allele for red eyes is dominant to the allele for brown eyes.

Option (d) is given as “the allele for red eyes is dominant to the allele for brown eyes”.

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Reasons for the incorrect statements.

Option (a) is given as “these alleles underwent independent assortment”.

Independent assortment can be explained with two traits only. Here, only one trait is mentioned, that is eye color, therefore, they can show only segregation, not independent assortment. Hence, option (a) is incorrect.

Option (b) is given as “these alleles underwent segregation”.

This option is correct, yet the most suitable option will be option (d) as the law of segregation has proved right for single traits. This experiment reveals the dominant allele more than segregation. Hence, option (b) is incorrect.

Option (c) is given as “these genes are X-linked”.

The question mentions that these alleles are present in autosomal loci and therefore, they cannot be X-linked. Hence, option (c) is incorrect.

Option (e) is given as “all the preceding are true”.

Option (d) is the most suitable answer followed by option (b). The other options are incorrect. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Conclusion

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant over the allele for brown eyes.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

. Consider a base substitution mutation that occurred in a DNA sequence that resulted in a change in the encoded protein from the amino acid glutamic acid to aspartic acid. Normally the glutamic acid amino acid is located on the outside of the soluble protein but not near an active site. O-H¨ A. What type of mutation occurred? O-H B. What 2 types of chemical bonds are found in the R-groups of each amino acid? The R groups are shaded. CH2 CH2 CH2 H2N-C-COOH H2N-C-COOH 1 H Glutamic acid H Aspartic acid C. What 2 types of bonds could each R-group of each of these amino acids form with other molecules? D. Consider the chemical properties of the two amino acids and the location of the amino acid in the protein. Explain what effect this mutation will have on this protein's function and why.

engineered constructs that consist of hollow fibers are acting as synthetic capillaries, around which cells have been loaded. The cellular space around a single fiber can be modeled as if it were a Krogh tissue cylinder. Each fiber has an outside “capillary” radius of 100 µm and the “tissue” radius can be taken as 200 µm. The following values apply to the device:R0 = 20 µM/secaO2 = 1.35 µM/mmHgDO2,T = 1.67 x 10-5 cm2/secPO2,m = 4 x 10-3 cm/secInstead of blood inside the fibers, the oxygen transport and tissue consumption are being investigated by usingan aqueous solution saturated with pure oxygen. As a result, there is no mass transfer resistance in the synthetic“capillary”, only that due to the membrane itself. Rather than accounting for pO2 variations along the length ofthe fiber, use an average value in the “capillary” of 130 mmHg.Is the tissue fully oxygenated?

Molecular Biology Please help with question. thank you You are studying the expression of the lac operon. You have isolated mutants as described below. In the presence of glucose, explain/describe what would happen, for each mutant, to the expression of the lac operon when you add lactose AND what would happen when the bacteria has used up all of the lactose (if the mutant is able to use lactose).5. Mutations in the lac operator that strengthen the binding of the lac repressor 200 fold 6. Mutations in the promoter that prevent binding of RNA polymerase 7. Mutations in CRP/CAP protein that prevent binding of cAMP8. Mutations in sigma factor that prevent binding of sigma to core RNA polymerase

Answer 2

Textbook Question

Chapter 11, Problem 1TYU

One of the autosomal loci controlling eye color in fruit flies has two alleles: one for brown eyes and the other for red eyes. Fruit flies from a true-breeding line with brown eyes were crossed with flies from a true-breeding line with red eyes. The F₁ flies had red eyes. What conclusion can be drawn from this experiment? (a) these alleles underwent independent assortment (b) these alleles underwent segregation (c) these genes are X-linked (d) the allele for red eyes is dominant to the allele for brown eyes (e) all the preceding are true

Expert Solution & Answer

Summary Introduction

Introduction: Locus (pl:loci) is the specific location of the gene in the chromosome. Alleles are variants of a gene. The allele that masks the expression of the other allele in heterozygous form is called the dominant allele.

Answer to Problem 1TYU

Correct answer: When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 had red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Explanation of Solution

Reason for the correct answer.

When true breeding parents are crossed where one parent is homozygous for one allele and the other parent is homozygous for another allele, the trait expressed in the F1 generation is the dominant allele. When applying the above principle for the given question, where fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes. This shows that the allele for red eyes is dominant to the allele for brown eyes.

Option (d) is given as “the allele for red eyes is dominant to the allele for brown eyes”.

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Reasons for the incorrect statements.

Option (a) is given as “these alleles underwent independent assortment”.

Independent assortment can be explained with two traits only. Here, only one trait is mentioned, that is eye color, therefore, they can show only segregation, not independent assortment. Hence, option (a) is incorrect.

Option (b) is given as “these alleles underwent segregation”.

This option is correct, yet the most suitable option will be option (d) as the law of segregation has proved right for single traits. This experiment reveals the dominant allele more than segregation. Hence, option (b) is incorrect.

Option (c) is given as “these genes are X-linked”.

The question mentions that these alleles are present in autosomal loci and therefore, they cannot be X-linked. Hence, option (c) is incorrect.

Option (e) is given as “all the preceding are true”.

Option (d) is the most suitable answer followed by option (b). The other options are incorrect. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Conclusion

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant over the allele for brown eyes.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 11, Problem 1TYU

One of the autosomal loci controlling eye color in fruit flies has two alleles: one for brown eyes and the other for red eyes. Fruit flies from a true-breeding line with brown eyes were crossed with flies from a true-breeding line with red eyes. The F₁ flies had red eyes. What conclusion can be drawn from this experiment? (a) these alleles underwent independent assortment (b) these alleles underwent segregation (c) these genes are X-linked (d) the allele for red eyes is dominant to the allele for brown eyes (e) all the preceding are true

Expert Solution & Answer

Summary Introduction

Introduction: Locus (pl:loci) is the specific location of the gene in the chromosome. Alleles are variants of a gene. The allele that masks the expression of the other allele in heterozygous form is called the dominant allele.

Answer to Problem 1TYU

Correct answer: When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 had red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Explanation of Solution

Reason for the correct answer.

When true breeding parents are crossed where one parent is homozygous for one allele and the other parent is homozygous for another allele, the trait expressed in the F1 generation is the dominant allele. When applying the above principle for the given question, where fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes. This shows that the allele for red eyes is dominant to the allele for brown eyes.

Option (d) is given as “the allele for red eyes is dominant to the allele for brown eyes”.

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Reasons for the incorrect statements.

Option (a) is given as “these alleles underwent independent assortment”.

Independent assortment can be explained with two traits only. Here, only one trait is mentioned, that is eye color, therefore, they can show only segregation, not independent assortment. Hence, option (a) is incorrect.

Option (b) is given as “these alleles underwent segregation”.

This option is correct, yet the most suitable option will be option (d) as the law of segregation has proved right for single traits. This experiment reveals the dominant allele more than segregation. Hence, option (b) is incorrect.

Option (c) is given as “these genes are X-linked”.

The question mentions that these alleles are present in autosomal loci and therefore, they cannot be X-linked. Hence, option (c) is incorrect.

Option (e) is given as “all the preceding are true”.

Option (d) is the most suitable answer followed by option (b). The other options are incorrect. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Conclusion

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant over the allele for brown eyes.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 11, Problem 1TYU

One of the autosomal loci controlling eye color in fruit flies has two alleles: one for brown eyes and the other for red eyes. Fruit flies from a true-breeding line with brown eyes were crossed with flies from a true-breeding line with red eyes. The F₁ flies had red eyes. What conclusion can be drawn from this experiment? (a) these alleles underwent independent assortment (b) these alleles underwent segregation (c) these genes are X-linked (d) the allele for red eyes is dominant to the allele for brown eyes (e) all the preceding are true

Expert Solution & Answer

Summary Introduction

Introduction: Locus (pl:loci) is the specific location of the gene in the chromosome. Alleles are variants of a gene. The allele that masks the expression of the other allele in heterozygous form is called the dominant allele.

Answer to Problem 1TYU

Correct answer: When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 had red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Explanation of Solution

Reason for the correct answer.

When true breeding parents are crossed where one parent is homozygous for one allele and the other parent is homozygous for another allele, the trait expressed in the F1 generation is the dominant allele. When applying the above principle for the given question, where fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes. This shows that the allele for red eyes is dominant to the allele for brown eyes.

Option (d) is given as “the allele for red eyes is dominant to the allele for brown eyes”.

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Reasons for the incorrect statements.

Option (a) is given as “these alleles underwent independent assortment”.

Independent assortment can be explained with two traits only. Here, only one trait is mentioned, that is eye color, therefore, they can show only segregation, not independent assortment. Hence, option (a) is incorrect.

Option (b) is given as “these alleles underwent segregation”.

This option is correct, yet the most suitable option will be option (d) as the law of segregation has proved right for single traits. This experiment reveals the dominant allele more than segregation. Hence, option (b) is incorrect.

Option (c) is given as “these genes are X-linked”.

The question mentions that these alleles are present in autosomal loci and therefore, they cannot be X-linked. Hence, option (c) is incorrect.

Option (e) is given as “all the preceding are true”.

Option (d) is the most suitable answer followed by option (b). The other options are incorrect. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Conclusion

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant over the allele for brown eyes.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

Introduction: Locus (pl:loci) is the specific location of the gene in the chromosome. Alleles are variants of a gene. The allele that masks the expression of the other allele in heterozygous form is called the dominant allele.

Answer to Problem 1TYU

Correct answer: When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 had red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Explanation of Solution

Reason for the correct answer.

When true breeding parents are crossed where one parent is homozygous for one allele and the other parent is homozygous for another allele, the trait expressed in the F1 generation is the dominant allele. When applying the above principle for the given question, where fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes. This shows that the allele for red eyes is dominant to the allele for brown eyes.

Option (d) is given as “the allele for red eyes is dominant to the allele for brown eyes”.

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Reasons for the incorrect statements.

Option (a) is given as “these alleles underwent independent assortment”.

Independent assortment can be explained with two traits only. Here, only one trait is mentioned, that is eye color, therefore, they can show only segregation, not independent assortment. Hence, option (a) is incorrect.

Option (b) is given as “these alleles underwent segregation”.

This option is correct, yet the most suitable option will be option (d) as the law of segregation has proved right for single traits. This experiment reveals the dominant allele more than segregation. Hence, option (b) is incorrect.

Option (c) is given as “these genes are X-linked”.

The question mentions that these alleles are present in autosomal loci and therefore, they cannot be X-linked. Hence, option (c) is incorrect.

Option (e) is given as “all the preceding are true”.

Option (d) is the most suitable answer followed by option (b). The other options are incorrect. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Conclusion

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant over the allele for brown eyes.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction: Locus (pl:loci) is the specific location of the gene in the chromosome. Alleles are variants of a gene. The allele that masks the expression of the other allele in heterozygous form is called the dominant allele.

Answer to Problem 1TYU

Correct answer: When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 had red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Explanation of Solution

Reason for the correct answer.

When true breeding parents are crossed where one parent is homozygous for one allele and the other parent is homozygous for another allele, the trait expressed in the F1 generation is the dominant allele. When applying the above principle for the given question, where fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes. This shows that the allele for red eyes is dominant to the allele for brown eyes.

Option (d) is given as “the allele for red eyes is dominant to the allele for brown eyes”.

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Reasons for the incorrect statements.

Option (a) is given as “these alleles underwent independent assortment”.

Independent assortment can be explained with two traits only. Here, only one trait is mentioned, that is eye color, therefore, they can show only segregation, not independent assortment. Hence, option (a) is incorrect.

Option (b) is given as “these alleles underwent segregation”.

This option is correct, yet the most suitable option will be option (d) as the law of segregation has proved right for single traits. This experiment reveals the dominant allele more than segregation. Hence, option (b) is incorrect.

Option (c) is given as “these genes are X-linked”.

The question mentions that these alleles are present in autosomal loci and therefore, they cannot be X-linked. Hence, option (c) is incorrect.

Option (e) is given as “all the preceding are true”.

Option (d) is the most suitable answer followed by option (b). The other options are incorrect. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Conclusion

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant over the allele for brown eyes.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction: Locus (pl:loci) is the specific location of the gene in the chromosome. Alleles are variants of a gene. The allele that masks the expression of the other allele in heterozygous form is called the dominant allele.

Answer 12

Answer to Problem 1TYU

Correct answer: When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 had red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Answer 13

Explanation of Solution

Reason for the correct answer.

When true breeding parents are crossed where one parent is homozygous for one allele and the other parent is homozygous for another allele, the trait expressed in the F1 generation is the dominant allele. When applying the above principle for the given question, where fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes. This shows that the allele for red eyes is dominant to the allele for brown eyes.

Option (d) is given as “the allele for red eyes is dominant to the allele for brown eyes”.

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant to the allele for brown eyes. Therefore, option (d) is correct.

Reasons for the incorrect statements.

Option (a) is given as “these alleles underwent independent assortment”.

Independent assortment can be explained with two traits only. Here, only one trait is mentioned, that is eye color, therefore, they can show only segregation, not independent assortment. Hence, option (a) is incorrect.

Option (b) is given as “these alleles underwent segregation”.

This option is correct, yet the most suitable option will be option (d) as the law of segregation has proved right for single traits. This experiment reveals the dominant allele more than segregation. Hence, option (b) is incorrect.

Option (c) is given as “these genes are X-linked”.

The question mentions that these alleles are present in autosomal loci and therefore, they cannot be X-linked. Hence, option (c) is incorrect.

Option (e) is given as “all the preceding are true”.

Option (d) is the most suitable answer followed by option (b). The other options are incorrect. Hence, option (e) is incorrect.

Hence, options (a), (b), (c), and (e) are incorrect.

Answer 14

Conclusion

When fruits flies of true-breeding line with brown eyes are crossed with fruits flies of true-breeding line with red eyes, the F1 will have red eyes that show that the allele for red eyes is dominant over the allele for brown eyes.

Answer 15

Ch. 11.1 - Define the terms phenotype, genotype, locus,...Ch. 11.1 - Describe Mendels principles of segregation and...Ch. 11.1 - Distinguish among monohybrid, dihybrid, and test...Ch. 11.1 - Explain Mendels principles of segregation and...Ch. 11.1 - What is the maximum number of different alleles...Ch. 11.1 - Can Mendels principle of segregation be...Ch. 11.1 - Prob. 3C Ch. 11.2 - PREDICT Use the rules of probability to answer the...Ch. 11.2 - In answering the previous question, did you use...Ch. 11.3 - Define linkage and relate it to specific events in...

Concept explainers

Videos

Answer to Problem 1TYU

Explanation of Solution

Want to see more full solutions like this?

Chapter 11 Solutions