Sugars are attached to the pyrimidines by the formation of

Enzyme aminoacyl synthetase is responsible for

$A$ : Wobbling reduces the number of $tRNAs$ required for polypeptide synthesis.
$R$ : It increases the effect of code degeneracy

At a particular locus, frequency of $‘A’$ allele is $0.6$ and that of $‘a’$ is $0.4$. What would be the frequency of heterozygotes in a random mating population of equilibrium