(Solved) Human Pedigree

siermo

wrote...

solved

Posts: 5

Rep:

12 years ago

Based on this pedigree, (see attached photo)

A. The probability that individual II-5 is a carrier is 50%
B. If individual II-1 is a carrier, there is a chance 50% that her male child will have red-green colorblindness.
C. It is impossible to determine whether II-5 is a carrier.
D. If individual III-3 is a carrier, all her female children will have red-green color blindness.

This is an autosomal dominant pedigree is it not? Color blindness is X-linked. And if you're affected, you're obviously 100% carrier. So I'm confused...what am I missing??

Attached file

Thumbnail(s):

You must login or register to gain access to this attachment.

Read 907 times

4 Replies

Report

Related Topics

A Human Pedigree
Solved Pedigree
Pedigree
Solved Below is a pedigree of a fairly common human hereditary trait in which the boxes
pedigree
Pedigree
Solved Throughout the life course, gender shapes
Solved The concept of human capital describes

Replies

zoeksyrianos

wrote...

12 years ago

Quote from: siermo (12 years ago)

B. If individual II-1 is a carrier, there is a chance 50% that her male child will have red-green colorblindness.

This makes sense to me.

Report

andrearo

wrote...

12 years ago

Autosomal dominant tells us that the disease would be present in every generation (does not apply to your pedigree). Also, keep in mind that autosomal chromosomes are the "regular" chromosomes, when we think of an autosomal dominant or recessive disorder we exclude the sex chromsomes (the ones responsible for x-linked disorders).

Report

siermo Author

wrote...

12 years ago

Thank you!

Report

duddy

wrote...

Staff Member

12 years ago

Please mark as solved if you're satisfied with the answer.

Report

- Master of Science in Biology
- Bachelor of Science

New Topic

Home Search Q & A Board Gallery Resource Library Blog Dictionary Chat	Quick Links Start a Topic Latest Topics Unanswered Questions Courses Study Tools Browse by Textbook	Social Facebook YouTube Community Stats Who's Online Trending Staff	Help About Us Take the Tour Study Tips Posting Guidelines Terms and Policies Contact Us
Biology Forums - Study Force © 2010-2025 \| Powered by SMF \| SMF © 2015, Simple Machines \| Sitemap Biology-Forums.com is not affiliated with any publisher. Book covers, title and author names appear for reference only.