Knowee
Questions
Features
Study Tools

Hemophilia is recessive sex-linked disease. When you cross a heterozygous female and a male without hemophilia, what is the phenotype fraction of the offspring that will have hemophilia? Question 9 options: 3/4 4/4 1/4 0/4 2/4

Question

Hemophilia is recessive sex-linked disease. When you cross a heterozygous female and a male without hemophilia, what is the phenotype fraction of the offspring that will have hemophilia?

Question 9 options:

3/4

4/4

1/4

0/4

2/4

🧐 Not the exact question you are looking for?Go ask a question

Solution

Hemophilia is a sex-linked disease, which means it is carried on the X chromosome.

A heterozygous female (XHXh) has one X chromosome with the hemophilia gene (Xh) and one without (XH). A male without hemophilia has only one X chromosome, and it does not carry the hemophilia gene (XHY).

When you cross these two individuals, you get the following possible combinations:

  1. XHXH (healthy female)
  2. XHXh (carrier female)
  3. XHY (healthy male)
  4. XhY (male with hemophilia)

So, out of 4 possible outcomes, only 1 results in an offspring with hemophilia. Therefore, the phenotype fraction of the offspring that will have hemophilia is 1/4.

This problem has been solved

Similar Questions

Hemophilia is a sex-linked recessive disorder.  A man with hemophilia mates with a woman who is a carrier for the disease.  What percentage of their children will get hemophilia ?

Hemophilia is a sex-linked recessive disorder.  A man with hemophilia mates with a woman who is a carrier for the disease.  What is the genotype of the woman?

A female with AB blood type and a male with heterozygous blood type A. The genotype fractions for these children (overall) would be Question 7 options: 1/2 type A, 1/4 type AB, and 1/4 type B. 1/2 type A and 1/2 type B. 1/4 type A, 1/2 type AB, and 1/4 type B. 1/4 type A, ¼ type AB, and 1/2 type B. 1/2 type A and 1/2 type AB.

Why are human males much more likely than human females to inherit the recessive condition hemophilia (a failure of the blood to clot properly)?View Available Hint(s)for Part Athe gene for hemophilia is sex-linkedthe gene for hemophilia is carried on the Y chromosomehemophilia is the wild typethe hemophilia gene is carried on an autosome

A man who is heterozygous for type A blood has children with a woman who is heterozygous for type B blood. What is the probability they will have a child with type A blood?Group of answer choices25%100%75%50%0%

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.