Which topic would be covered within the subdiscipline of population genetics?a. determining the mechanism of DNA replication in a bacterial species.b. study of pedigrees to understand the type of inheritance of a trait determining the type of change in DNA that produced a mutation responsible for a genetic diseasec. determining the probability that a couple who has one child with a genetic disorder will have another child with the same genetic disorderd. effect of small numbers of individuals on changes in the frequencies of an allele