Question

What is the type of inheritance shown in the following pedigree? Blue represents no disease symptoms, pink represents having disease symptoms. Squares are males and circles are females.

a.Sex linked dominant
b.Autosomal dominant
c.Sex linked recessive
d.Autosomal recessive

Answer 1

B. Autosomal dominant

Answer 2

Step-by-step explanation:

If the disorder is recessive, neither parent has to have the disorder because

they can be heterozygous. The characteristic features of autosomal recessive inheritance is as follows:-

•Appears in both sexes with equal frequency

• Trait tend to skip generations

• Affected offspring are usually born to unaffected parents

• When both parents are heterozygous approx. 1/4 of the progeny will be affected

• Appears more frequently among the children of consanguineous marriages.

The given pedigree follows these features. So the correct option is 'Autosomal recessive trait'.

Please correct me If I am wrong :)