An abnormal human baby with $‘XXX’$ sex chromosomes was born due to
fusion of two ova and one sperm
fusion of two sperms and one ovum
formation of abnormal sperms in the father
formation of abnormal ova in the mother.
The diagrammatic representation of the chromosomes of an individual is called
$A$ $Y-$linked gene is responsible for hypertrichosis (long hair on ears). When an affected man marries a normal woman, what percentage of their daughters would be expected to have hairy ears?
$A$ : Holandric traits are passed from one generation to the next generation.
$R$ : These traits appear more frequently in one sex than in other.
Improvement of human race by improving the environment is called
When Mendel self hybridised the $F_{1}$ plants $(RrYy)$, he found that dominant and recessive traits of one character are segregated in a