Answer to Question #162286 in Biology for Anas Bajbouj

Question #162286

Solve the problem: Unicornism is an X linked recessive trait. A normal man marries a normal woman and they have many children. 

 

They have normal and unicorned boys, and all the girls are normal.

 

Using a punnet square and also showing the genotypes of the parents and children explain how this can happen .


1
Expert's answer
2021-02-15T12:06:52-0500

Let's consider that d is a disease allele while D is a normal allele. Only individuals with two disease alleles have unicornism. Since the parents have a son with the disease and are healthy, it can be suggested that the mother is a carrier of the disease allele d. From here, the genotypes of parents and their gametes are:

Male: XDY; gametes - XD and Y;

Female: XDXd; gametes - XD and Xd.

From here, the genotypes of their children are:


Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!

Leave a comment

LATEST TUTORIALS
New on Blog
APPROVED BY CLIENTS