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

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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.

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Students have asked these similar questions

Which statement about the pattern of inheritance for a recessive X-linked allele is true? A. Unaffected parents can produce daughters who are affected. B. Unaffected parents can have sons who are affected and daughters who are carriers. C. Unaffected fathers can be carriers. D. Affected parents do not produce affected children. E. Every affected person has an affected parent.

Organism X has the genotype Ccdd. How many different types of gametes can it make and in what proportion? * A. 3 Cd 1 cd B. 1 CD: 1 Cd : 1 cD 1 cd C. 1 Cc : 1 dd D. 1 Cd 1 cd A human female "carrier" who is heterozygous for the recessive, sex-linked trait hemophilia (XHXH), marries a normal male (XHY). What proportion of their male progeny will show the trait? A. 1/4 B. 1/2 C. 0 D. All

In humans, potential or expecting parents can be tested for the presence of the allele for the autosomal recessive cystic fibrosis. Which combination of parents are LEAST likely to produce a child with cystic fibrosis? A. 2 parents with cystic fibrosis B. 2 parents without cystic fibrosis C. 1 parent without cystic fibrosis and 1 with cystic fibrosis D. 2 parents who do not know if they have cystic fibrosis

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.

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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.

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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.

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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

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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.

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Answer to Problem 1U

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