question_answer

Given pedigree chart depicts the inheritance of attached ear-lobes, an autosomal recessive trait.

Which of the following conclusions drawn is correct?

   

A) Parents are heterozygous dominant.

B) Parents are homozygous dominant.

C) Parents are homozygous recessive.

D) None of these.

Correct Answer: A

Solution :

Given pedigree can be illustrated as follows:

Hence, the parents are heterozygous dominant.