Question

Observe the pedigree chart given below. Find out the cause of trait, i.e. it is due to

• A. Incompletely dominant allele
• B. Dominant allele
• C. Either dominant or recessive allele
• D. Recessive allele

Answer 1

Answer: (C)

For the pedigree chart given in the question, the cause of the trait can either be due to a dominant allele or a recessive allele.
It can be depicted by the two cases given below
I. When ' $A$ ' is the dominant allele for the trait and ' $a$ ' is the normal recessive allele.

II. When ' $a$ ' is the recessive allele for the trait and ' $A$ ' is the normal dominant allele.