(a) Give the genotype of parent in 1st generation and of son and daughter shown in 2nd generation.

Question

Study the given pedigree chart show the inheritance pattern of a human trait and answer questions given below.
(a) Give the genotype of parent in 1st generation and of son and daughter shown in 2nd generation.
(b) give the genotype of daughters shown in 3rd generation.
(c) Is the trait sex linked or autosomal. Justify your answer.

Answer 1

(a) Genotypes of parents in Generation 1. Male – Aa Female – Aa Son (Generation II) – Aa Daughter (Generation II) – aa.
(b) Genotype of the daughter in Generation III – Aa
(c) It is an autosomal trait and not sex-linked because if it is a sex-linked, the daughter in generation II cannot have it.