In a population of $1000$ individuals $360$ belong to genotype $AA, 480$ to Aa and the remaining $160$ to $aa$. Based on this data, the frequency of allele $A$ in the population is
$0.4$
$0.5$
$0.6$
$0.7$
Random genetic drift in a population probably results from
Which is the most common mechanism of genetic variation in the population of a sexually reproducing organism ?
Random unidirectional change in allele frequencies that occurs by chance in all populations and especially in small populations is known as
Natural selection in which more individuals acquire peripheral character value at both the ends of the distribution curve is