The afrikaner population of dutch settlers in south africa is descended mainly from a few colonists. today, the afrikaner population has an unusually high frequency of the gene that causes huntington's disease. huntington's disease is an autosomal dominant disease and only one allele is needed for the disease (hh, hh). the afrikaners are an example of a founder effect. it is also an example of genetic drift. how is the founder effect related to the concept of genetic drift? a. reduced genetic variation of this small population means that the population may not be able to adapt to new selection pressures. b. in a small population, the more advantageous trait becomes more common. if this continues, eventually, all individuals in the population will have huntington's disease. c. the small population size means that the new colony may have reduced genetic variation from the original population and that variation, in this case, included the dominant allele for huntington's disease. d. there are three sources of genetic variation: gene flow, sexual reproduction and mutation. in the case of the afrikaners, once the settlers arrived in africa, these three sources had little impact on the gene pool and variation.
Answers: 1
Biology, 22.06.2019 15:30, goodluck99
Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food
Answers: 1
The afrikaner population of dutch settlers in south africa is descended mainly from a few colonists....
Mathematics, 06.06.2020 23:00