Hemophilia is a recessive sex linked trait and is carried on the X chromosome. Sara who had hemophilia married a man (Tim) who did not have hemophilia. They had 2 children, a boy and a girl. Use this punnett square to explain whether (and why) each kid had hemophilia or not. Be thorough for full credit. XH Y Xh Xh
Added by Aaron L.
Close
Step 1
Hemophilia is a recessive sex-linked trait that is carried on the X chromosome. Since it is recessive, an individual must have two copies of the hemophilia allele (one from each parent) to express the disease if they are female (XX), but only one copy if they are Show more…
Show all steps
Your feedback will help us improve your experience
Sri K and 78 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
Hemophilia is a hereditary disease that prevents a person's blood from clotting correctly. The gene responsible for blood clotting is located on the X chromosome of the sex chromosome pair (X and Y). This is called X-linked inheritance. The dominant gene is H, and the recessive gene causing hemophilia is h. Anyone with the dominant gene will not inherit hemophilia. The mother (X^h, X^H) and father (X^H and Y) have children X^H X^H, H^H X^h, X^H Y, and X^h Y. What are the chances of a child having hemophilia? Why?
Madhur L.
Hemophilia is caused by a sex-linked recessive allele. This means that women can be carriers but cannot get hemophilia. The gene is found on the X chromosome. A man can give the allele to his daughter but not to his son. A son who has hemophilia inherited the allele from his mother.
Adi S.
Hemophilia is a recessive X-linked disorder. When a normal female and a hemophilia male marry, which genotype(s) is(are) possible for their daughter? XH - Normal dominant allele Xh - Recessive allele showing disorder 1. XhY 2. XHY 3. XhY and XHY 4. XhXh 5. XHXH 6. XHXh 7. XHXh and XHXH 8. XhXh and XHXh 9. XHXH and XhXh 10. XhXh and XHXH and XHXh
Nicholas M.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD