$tRNA$ is composed of about how many nucleotides
$50$ to $55$
$75 $ to $90$
$92$ to $98$
More than $100$
Histones are rich in
Transition type of gene mutation is caused when
Balbiani discovered special type of chromosome from the salivary gland of Chironomus larva which are recognized by the presence of
In lac operon, the regulator gene codes for
A male human is heterozygous for autosomal genes $A$ and $B$ and is also hemizygous for hemophilic gene $h$. What proportion of his sperms will be $abh$