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 is the process that is "capable of destroying all forms of microbial life"? Question 37 options: Surgical scrub Sterilization Chemical removal Mechanical removal

After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.) After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.) Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100% To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…

What are Clathrin coated vesicles and what is their function?

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