Question 1 Hemophilia is a blood clotting disorder and inherited as an x-linked recessive trait with the allele for no hemophilia ) being dominant to the allele for hemophilia ( h ). Jill does not have hemophilia but is a carrier of the recessive allele. Jill's husband Tom suffers from hemophilia. Please answer the following questions regarding a cross between Jill and Tom. Make sure your answers are written in percentages. What are the chances they will produce a daughter that is a carrier for hemophilia? ◻ What are the chances they will produce a son that has hemophilia? ◻ What is the chance that none of their children will have hemophilia? ◻
Added by Scott F.
Step 1
- Jill does not have hemophilia but is a carrier, so her genotype is XHXh. - Tom has hemophilia, so his genotype is XhY. Show more…
Show all steps
Your feedback will help us improve your experience
Jonathan Temple and 58 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The following question is a sex-linked trait. Review the patterns of inheritance of sex-linked traits before answering the following questions. Make sure to indicate chromosomes and alleles in your answers when necessary. Hemophilia is a caused by a recessive mutation found on the X chromosome in humans. The recessive allele (Xh) is associated with abnormal blood clotting (hemophilia), while the dominant allele (XN) causes normal blood clotting. A man with normal blood clotting and woman who is heterozygous are going to have a child. What is the probability of an offspring who is a carrier of hemophilia, and if so, the sex(es) of the offspring? Chances are 25% of a son who is a carrier. There is no chance of an offspring who is a carrier. Chances are 50% of either a son or a daughter who is a carrier. Chances are 1 in 4 of a daughter who is a carrier. All offspring, male or female, will be carriers.
Jonathan T.
Hemophilia is an X-linked recessive gene. Xh Use a capital "X" to denote the X chromosome. Use the superscript H or h to represent the trait (capital = dominant; lowercase = recessive) (for example, the father in this problem is XHY). As you did with monohybrid crosses, write the alleles of the father above the Punnett square, and the alleles of the mother on the left side. Once you have figured out the mother's genotype and alleles, please answer question 11.1. XH Y Question 11.1 (2.5 points): What is the genotype of the mother? XH XH XH Xh Xh Xh Once you know the genotype of the mother, complete the cross following the steps we have learned in monohybrid crosses and answer questions 11.2, 11.3, and 11.4. Question 11.2: What percentage of their sons will have hemophilia? 100% 50% 25% Question 11.3: What percentage of their daughters will be normal (no hemophilia)? 100% 50% 25% Question 11.4: What percentage of their daughters will carry the recessive gene (Xh)? 100% 50% 25%
Anand J.
In humans, hemophilia is a sex-linked recessive trait. It is located on the X chromosome. Remember that the human female genotype is XX and the male genotype is XY. Suppose that a daughter of a mother that is a carrier for the disease and a father without the allele becomes a carrier herself and then marries a man with hemophilia. What is the probability that the daughter's children will develop the disease? Will any of the daughters children become carriers? Describe how you determined the probability
Suman K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD