Question

The given pedigree depicts a rare disorder through three generations of a family.

The number of females in generation II that passed the disorder to their offspring are?

• A. 0
• B. 1
• C. 2
• D. 3
• E. 4

Answer 1

The correct option is B 1

Generation II has total 5 females with 2 affected and 3 normal ones. Out of two affected females, one female is crossed with the normal male. Since the normal parents have normal progeny, the trait exhibit dominant inheritance. The affected female transmits its affected copies of chromosomes to half of its progeny. Thus, the correct answer is option B.