Drosophila melanogastor has $8$ chromosomes in somatic cell. How many linkage groups will be there
$4$
$8$
$2$
$5$
Study of human race is called
In human the inheritance of sex linkage takes place through
$A$ : Pseudoalleles are actually closely linked genes.
$R$ : These can be identified easily as both affect different characters, providing separate phenotypes
If an albino man marries with a normal woman and $50$ offsprings are albino and $50$ are normal, the woman is
A hereditary disease, which is never passed on from father to son is