In Cooley's Anemia, the affected chain of a haemoglobin is
$\alpha$-globin chain
$\beta$-globin chain
Both $(a)$ and $(b)$
None of these
One of the parents of a cross has a mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of ${F_2}$ progenies that mutation is found in
The gene which increases the frequency of mutation in other gene is referred to as
Self sterility in "Nicotiana'' was reported by
Lesch Nyhan disease is an $X-$linked recessive disorder that causes neurological damage in human beings. $A$ survey of $500$ mates from a caucasion population revealed that $20$ were effected with this disorder. What is the frequency of the normal allele in this population?
Polytene chromosomes in salivary glands of are formed as a result of