Q. What percentage of homozygous $Rh^{-}$ will be born amongst four children of a couple where the husband is heterozygous for $Rh^{+}$ and wife is homozygous for $Rh^{-}$gene?
A) 25%
B) 50%
C) 75%
D) 100%
Explanation
The husband is heterozygous for $Rh^{+}$so, it will (Rh rh) and wife is homozygous of $Rh^{-}$ so, it will have genetic alleles (rh rh) : So, 50% homozygous $Rh^{-}$ children will be born.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.