Please answer and explain, I thought it was C but due to the next slide (attache
ID: 190917 • Letter: P
Question
Please answer and explain, I thought it was C but due to the next slide (attached) I am confused. What causes DNA differences to accumulate between reproductively isolated populations?
A. Mutations
B. Natural selection
C. Genetic drift
Connected Northern ancestral population solation Mutations Eastern migration southward establishes these populations. Western migration southward establishes these populations. Mutations Central Valley Selection Selection and drift Genetic differences build up between populations. Mutations Mutations Selection and drift Selection and drift In the end, two reproductively solated populations cannot mate in Southern California. 23Explanation / Answer
In reproductively isolated populations, the differences in DNA are due to mutations, natural selection and genetic drift. The mutations favor the reproductively isolated population by producing fertile offspring contributing to reproductive success and lead to the allopatric speciation. The reproduction success caused by mutations depend on natural selection and genetic drift enabling the persistance of genes that favor the population and remove the unfit alleles or genes from the population and result in altering of the genotype frequencies.
In the given image it has been shown that the mutations in earlier populations have been passed to next generations on which the natural selection and genetic drift have shown effects producing the final population containing different reproductively isolated species.
Thus, option D is correct.