Match following pair.
$x$ - human, $y$ - drosophila
$x$ -drosophila, $y$ - hen
$x$ - hen, $y$ - human
$x$ -drosophila, $y$ - human
Determination of sex of a child depends upon
In man the normal number of chromosomes is
Definitions / Explanation : Sex determination
Genetic identity of a human male is determined by
Sex of a human child is determined by