Question

Excessive growth of hair on the pinna is a feature found only in males because

• A. The gene responsible for the character is present on Y-chromosome only
• B. The female sex hormone estrogen suppresses the character in females
• C. The character is induced in males as males produce testosterone
• D. The gene responsible for the character is recessive in females and dominant only in males

Answer 1

The correct option is A The gene responsible for the character is present on Y-chromosome only

Excessive growth of hair on the pinna is a feature found only in males because it is Y-linked.