Question

In the following Pedigree Chart state if trait
in autosomal dominant, autosomal recessive or sex linked. Give Reason​

Answer 1

a)The trait is a dominant one as all the generations are affected.

b)The trait is autosomal because both the sexes are equally affected.

c)If 'A' is the dominant allele for the trait and 'a' is the recessive allele,

The genotype of the generation 1 parent is -aa and Aa.

The genotype of a third child in the generation is- Aa.

The genotype of the first grandchild in -Aa.