In Turner's syndrome
Female is fertile
Male is fertile
Female is sterile
Male is sterile
Meta-females have
Number of Barr bodies in $XXXXY$ is
An albino lady marries a normal man having one gene for albinism. They have $3$ daughters and $1$ son. The son will be
The hybrids are generally found to be superior to their parents, it is because of
Improvement of human race by improving the environment is called