Explore BrainMass
Share

Sex-linked Genetic traits

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

Predict the parental genotypes for individuals expressing the dominant or the recessive trait. What sex generally expresses the recessive trait? Why?

© BrainMass Inc. brainmass.com December 20, 2018, 3:43 am ad1c9bdddf
https://brainmass.com/biology/genetics/sex-linked-genetic-traits-264406

Solution Preview

Sex-linked traits are those carried on either the X or Y chromosome. Because females have two X chromosomes and males have XY the frequency of the trait is different from autosomal traits and is influenced by the sex of the organism.

For example, let's say a trait is dominant (A) and X-linked (this means that an individual only needs to inherit one copy of the dominant allele to express the trait).
XAXa x XaY
XA Xa
Xa XAXa XaXa
Y XAY ...

Solution Summary

Detailed explanation of how to predict if a trait is dominant, recessive, and/or sex-linked. Web references provided.

$2.19