Question

Following pedigree chart shows

• A. recessive and autosomal
• B. recessive and sex-linked
• C. dominant and sex-linked
• D. dominant and autosomal

Answer 1

The correct option is A recessive and autosomal

In the 1st generation, one of the offspring is affected but the parents are normal indicating that parents are carries which means the disease is only expressed in homozygous condition. So, the pedigree shows recessive disease. If the disease is a sex linked, then one of the parents will be affected which is not in this case. So, the pidegree shows autosomal disease. Hence, given pedigree analysis indicates the transmission of autosomal recessive trait from parents to their offsprings.