In this part, you will work out on X-linked traits. Remember that males have only one X chromosome and females have two.
For X-linked recessive, use the following designations:
XA= normal
Xa= the trait (a genetic disease or abnormality)
For X-linked dominant, use the following designations:
XA= the trait (a genetic disease or abnormality)
Xa= normal
Determine if the pedigrees below can be for a trait that is X-linked recessive. Write the genotype next to the symbol for each person in the pedigree below.
A. Is it possible that this pedigree is for an X-linked recessive trait?
B. What can you conclude about the children of mothers affected with an X-linked recessive characteristic?
C. What can you conclude about the father of an affected female?
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