Why is the white-eye phenotype always observed in males carrying the white-eye allele? a. Because the trait is dominant b. Because the trait is recessive c. Because the allele is located on the X chromosome and males only have one X d. Because the allele is located on the Y chromosome and only males have Y chromosomes

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 13, Problem 1U

Why is the white-eye phenotype always observed in males carrying the white-eye allele?

a. Because the trait is dominant

b. Because the trait is recessive

c. Because the allele is located on the X chromosome and males only have one X

d. Because the allele is located on the Y chromosome and only males have Y chromosomes

Expert Solution & Answer

Summary Introduction

Introduction:

The sex chromosomes are those chromosomes that determine the sex of the organism. The females have a pair of X chromosomes, whereas, the males have a pair of dissimilar chromosomes (one X chromosome and one Y chromosome).

Answer to Problem 1U

Correct answer:

The white-eye phenotype is always observed in males carrying the white-eye allele because the allele is located on the X chromosome and males only have one X chromosome. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The gene responsible for the appearance of the white eye phenotype is present only on the X chromosome and it is not present on the Y chromosome.

Option c. is given as “because the allele is located on the X chromosome and males only have one X”.

As, “the Y chromosome lacks the gene responsible for the expression of the white eye phenotype and X chromosome has it. It is observed only in the males”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Because the trait is dominant”.

The trait will be dominant if it is expressing in the heterozygous or homozygous dominant conditions. Here, it cannot be determined that whether the condition is dominant or not. So, it is a wrong answer.

Option b. is given as “Because the trait is recessive”.

The trait will be recessive if it is expressing in the homozygous recessive conditions. Here, it cannot be determined that whether the condition is homozygous or not. So, it is a wrong answer.

Option d. is given as “Because the allele is located on the Y chromosome and only males have Y chromosomes”.

The allele for the gene responsible is not present on the Y chromosome. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Conclusion

The gene responsible for the white eye phenotype is present on the X chromosome only and males only have X chromosome and the Y chromosome does not have that gene.

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

Which of the following statements about hydration is true? Absence of thirst is a reliable indication that an individual is adequately hydrated. All of these statements are true. Although a popular way to monitor hydration status, weighing yourself before and after intensive physical activity is not a reliable method to monitor hydration. Urine that is the color of apple juice indicates dehydration. I don't know yet

Three of the many recessive mutations in Drosophila melanogaster that affect body color, wing shape, or bristle morphology are black (b) body versus grey in wild type, dumpy (dp), obliquely truncated wings versus long wings in the male, and hooked (hk) bristles versus not hooked in the wild type. From a cross of a dumpy female with a black and hooked male, all of the F1 were wild type for all three of the characters. The testcross of an F1 female with a dumpy, black, hooked male gave the following results: Trait Number of individuals Wild type 169 Black 19 Black, hooked 301 Dumpy, hooked 21 Hooked, dumpy, black 172 Dumpy, black 6 Dumpy 305 Hooked 8 Determine the order of the genes and the mapping distance between genes. Determine the coefficient of confidence for the portion of the chromosome involved in the cross. How much interference takes place in the cross?

What happens to a microbes membrane at colder temperature?

Answer 2

Textbook Question

Chapter 13, Problem 1U

Why is the white-eye phenotype always observed in males carrying the white-eye allele?

a. Because the trait is dominant

b. Because the trait is recessive

c. Because the allele is located on the X chromosome and males only have one X

d. Because the allele is located on the Y chromosome and only males have Y chromosomes

Expert Solution & Answer

Summary Introduction

Introduction:

The sex chromosomes are those chromosomes that determine the sex of the organism. The females have a pair of X chromosomes, whereas, the males have a pair of dissimilar chromosomes (one X chromosome and one Y chromosome).

Answer to Problem 1U

Correct answer:

The white-eye phenotype is always observed in males carrying the white-eye allele because the allele is located on the X chromosome and males only have one X chromosome. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The gene responsible for the appearance of the white eye phenotype is present only on the X chromosome and it is not present on the Y chromosome.

Option c. is given as “because the allele is located on the X chromosome and males only have one X”.

As, “the Y chromosome lacks the gene responsible for the expression of the white eye phenotype and X chromosome has it. It is observed only in the males”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Because the trait is dominant”.

The trait will be dominant if it is expressing in the heterozygous or homozygous dominant conditions. Here, it cannot be determined that whether the condition is dominant or not. So, it is a wrong answer.

Option b. is given as “Because the trait is recessive”.

The trait will be recessive if it is expressing in the homozygous recessive conditions. Here, it cannot be determined that whether the condition is homozygous or not. So, it is a wrong answer.

Option d. is given as “Because the allele is located on the Y chromosome and only males have Y chromosomes”.

The allele for the gene responsible is not present on the Y chromosome. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Conclusion

The gene responsible for the white eye phenotype is present on the X chromosome only and males only have X chromosome and the Y chromosome does not have that gene.

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 13, Problem 1U

Why is the white-eye phenotype always observed in males carrying the white-eye allele?

a. Because the trait is dominant

b. Because the trait is recessive

c. Because the allele is located on the X chromosome and males only have one X

d. Because the allele is located on the Y chromosome and only males have Y chromosomes

Expert Solution & Answer

Summary Introduction

Introduction:

The sex chromosomes are those chromosomes that determine the sex of the organism. The females have a pair of X chromosomes, whereas, the males have a pair of dissimilar chromosomes (one X chromosome and one Y chromosome).

Answer to Problem 1U

Correct answer:

The white-eye phenotype is always observed in males carrying the white-eye allele because the allele is located on the X chromosome and males only have one X chromosome. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The gene responsible for the appearance of the white eye phenotype is present only on the X chromosome and it is not present on the Y chromosome.

Option c. is given as “because the allele is located on the X chromosome and males only have one X”.

As, “the Y chromosome lacks the gene responsible for the expression of the white eye phenotype and X chromosome has it. It is observed only in the males”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Because the trait is dominant”.

The trait will be dominant if it is expressing in the heterozygous or homozygous dominant conditions. Here, it cannot be determined that whether the condition is dominant or not. So, it is a wrong answer.

Option b. is given as “Because the trait is recessive”.

The trait will be recessive if it is expressing in the homozygous recessive conditions. Here, it cannot be determined that whether the condition is homozygous or not. So, it is a wrong answer.

Option d. is given as “Because the allele is located on the Y chromosome and only males have Y chromosomes”.

The allele for the gene responsible is not present on the Y chromosome. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Conclusion

The gene responsible for the white eye phenotype is present on the X chromosome only and males only have X chromosome and the Y chromosome does not have that gene.

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 13, Problem 1U

Why is the white-eye phenotype always observed in males carrying the white-eye allele?

a. Because the trait is dominant

b. Because the trait is recessive

c. Because the allele is located on the X chromosome and males only have one X

d. Because the allele is located on the Y chromosome and only males have Y chromosomes

Expert Solution & Answer

Summary Introduction

Introduction:

The sex chromosomes are those chromosomes that determine the sex of the organism. The females have a pair of X chromosomes, whereas, the males have a pair of dissimilar chromosomes (one X chromosome and one Y chromosome).

Answer to Problem 1U

Correct answer:

The white-eye phenotype is always observed in males carrying the white-eye allele because the allele is located on the X chromosome and males only have one X chromosome. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The gene responsible for the appearance of the white eye phenotype is present only on the X chromosome and it is not present on the Y chromosome.

Option c. is given as “because the allele is located on the X chromosome and males only have one X”.

As, “the Y chromosome lacks the gene responsible for the expression of the white eye phenotype and X chromosome has it. It is observed only in the males”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Because the trait is dominant”.

The trait will be dominant if it is expressing in the heterozygous or homozygous dominant conditions. Here, it cannot be determined that whether the condition is dominant or not. So, it is a wrong answer.

Option b. is given as “Because the trait is recessive”.

The trait will be recessive if it is expressing in the homozygous recessive conditions. Here, it cannot be determined that whether the condition is homozygous or not. So, it is a wrong answer.

Option d. is given as “Because the allele is located on the Y chromosome and only males have Y chromosomes”.

The allele for the gene responsible is not present on the Y chromosome. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Conclusion

The gene responsible for the white eye phenotype is present on the X chromosome only and males only have X chromosome and the Y chromosome does not have that gene.

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:

The sex chromosomes are those chromosomes that determine the sex of the organism. The females have a pair of X chromosomes, whereas, the males have a pair of dissimilar chromosomes (one X chromosome and one Y chromosome).

Answer to Problem 1U

Correct answer:

The white-eye phenotype is always observed in males carrying the white-eye allele because the allele is located on the X chromosome and males only have one X chromosome. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The gene responsible for the appearance of the white eye phenotype is present only on the X chromosome and it is not present on the Y chromosome.

Option c. is given as “because the allele is located on the X chromosome and males only have one X”.

As, “the Y chromosome lacks the gene responsible for the expression of the white eye phenotype and X chromosome has it. It is observed only in the males”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Because the trait is dominant”.

The trait will be dominant if it is expressing in the heterozygous or homozygous dominant conditions. Here, it cannot be determined that whether the condition is dominant or not. So, it is a wrong answer.

Option b. is given as “Because the trait is recessive”.

The trait will be recessive if it is expressing in the homozygous recessive conditions. Here, it cannot be determined that whether the condition is homozygous or not. So, it is a wrong answer.

Option d. is given as “Because the allele is located on the Y chromosome and only males have Y chromosomes”.

The allele for the gene responsible is not present on the Y chromosome. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Conclusion

The gene responsible for the white eye phenotype is present on the X chromosome only and males only have X chromosome and the Y chromosome does not have that gene.

Answer 8

Expert Solution & Answer

Summary Introduction

Introduction:

The sex chromosomes are those chromosomes that determine the sex of the organism. The females have a pair of X chromosomes, whereas, the males have a pair of dissimilar chromosomes (one X chromosome and one Y chromosome).

Answer to Problem 1U

Correct answer:

The white-eye phenotype is always observed in males carrying the white-eye allele because the allele is located on the X chromosome and males only have one X chromosome. Therefore, option c. is correct.

Explanation of Solution

Reason for the correct statement:

The gene responsible for the appearance of the white eye phenotype is present only on the X chromosome and it is not present on the Y chromosome.

Option c. is given as “because the allele is located on the X chromosome and males only have one X”.

As, “the Y chromosome lacks the gene responsible for the expression of the white eye phenotype and X chromosome has it. It is observed only in the males”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Because the trait is dominant”.

The trait will be dominant if it is expressing in the heterozygous or homozygous dominant conditions. Here, it cannot be determined that whether the condition is dominant or not. So, it is a wrong answer.

Option b. is given as “Because the trait is recessive”.

The trait will be recessive if it is expressing in the homozygous recessive conditions. Here, it cannot be determined that whether the condition is homozygous or not. So, it is a wrong answer.

Option d. is given as “Because the allele is located on the Y chromosome and only males have Y chromosomes”.

The allele for the gene responsible is not present on the Y chromosome. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Conclusion

The gene responsible for the white eye phenotype is present on the X chromosome only and males only have X chromosome and the Y chromosome does not have that gene.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

Introduction:

The sex chromosomes are those chromosomes that determine the sex of the organism. The females have a pair of X chromosomes, whereas, the males have a pair of dissimilar chromosomes (one X chromosome and one Y chromosome).

Answer 12

Answer to Problem 1U

Correct answer:

The white-eye phenotype is always observed in males carrying the white-eye allele because the allele is located on the X chromosome and males only have one X chromosome. Therefore, option c. is correct.

Answer 13

Explanation of Solution

Reason for the correct statement:

The gene responsible for the appearance of the white eye phenotype is present only on the X chromosome and it is not present on the Y chromosome.

Option c. is given as “because the allele is located on the X chromosome and males only have one X”.

As, “the Y chromosome lacks the gene responsible for the expression of the white eye phenotype and X chromosome has it. It is observed only in the males”, it is the right answer.

Hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Because the trait is dominant”.

The trait will be dominant if it is expressing in the heterozygous or homozygous dominant conditions. Here, it cannot be determined that whether the condition is dominant or not. So, it is a wrong answer.

Option b. is given as “Because the trait is recessive”.

The trait will be recessive if it is expressing in the homozygous recessive conditions. Here, it cannot be determined that whether the condition is homozygous or not. So, it is a wrong answer.

Option d. is given as “Because the allele is located on the Y chromosome and only males have Y chromosomes”.

The allele for the gene responsible is not present on the Y chromosome. So, it is a wrong answer.

Hence, options a., b., and d. are incorrect.

Answer 14

Conclusion

The gene responsible for the white eye phenotype is present on the X chromosome only and males only have X chromosome and the Y chromosome does not have that gene.

Answer 15

Ch. 13 - Why is the white-eye phenotype always observed in...Ch. 13 - In an organisms genome, autosomes are a. the...Ch. 13 - What cellular process is responsible for genetic...Ch. 13 - The map distance between two genes is determined...Ch. 13 - How many map units separate two alleles if the...Ch. 13 - How does maternal inheritance of mitochondrial...Ch. 13 - Which of the following genotypes due to...Ch. 13 - Prob. 1A Ch. 13 - As real genetic distance increases, the distance...Ch. 13 - Down syndrome is the result of trisomy for...

Solution Summary: The author explains that the sex chromosome determines the sexuality of the organism. The white-eye phenotype is always observed in males carrying the allele.

Concept explainers

Videos

Answer to Problem 1U

Explanation of Solution

Want to see more full solutions like this?

Chapter 13 Solutions