1 How does the strength of selection affect the probability

1) How does the strength of selection affect the probability that an allele will disappear when the allele starts at a low frequency?

2) How does selection for heterozygotes affect the chance of an allele disappearing in a small population?

Solution

#2

Selection of heterozygotes affects the chance of recessive allele from being eliminated from the population. This is because it hides under the dominant allele. This way, even if recessive allele is lethal, it will not completely eliminate from the population. This is also termed as heterozygous advantage.