Question

Genetic drift can be an important evolutionary process. This is due to the fact that (A natural selection acting on the genetic variation of a large population B small isolated populations are unable to defend themselves from predators, therefore they loos genetic diversity. Natural selection, in this case, has less variation to work with. C when genetic drift is the only evolutionary process at work, one allele may be lost forever and the other may become fixed (100% frequency). D) in small populations the bottle neck effect is negligible

Answer 1

iswerGenetic drift can be an important evolutiona. axy process. This is due to the fact that - © when genetic drift is only evolutionary process at work, one allele may be I lost forever and the other may becom& fixed. los (100% frequency) explain : • Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to Schance events. To be more exact, genetic drift is change due to "sampling expop" o in selecting the alleles for the next generation from the gene pool of current generation. Although genetic drift happens in populations of all sizes, its effects tend to be stronger in small populations. example - Larger populations are unlikely to change this quickly as a result of genetic drif Ot. For instans if we followed a population of 1000 rabbits (instead likely of 10), it's much less that allele the b and would be lost that the would allele B reach 100% frequency, or fixation ) after such a short period and of time. It of time. If only half of the 1000 La survived oto reproduce, as in rabbits population survi notion of the example of above, generation the first of them would tend to the survivind rabbits (500 of them would tend he accurate representation of the allele frequencies of the original population simplu because the sample would be so much tance mor mu a be so much larger

. Genetic Dritt Generation 11 p (B gene frequency) = 0.5 q (6 gene frequency) = 0.5 B Brown a dominant bowhite recessive l colour ДЭВ DB вѣ Bь вь ) В ВЬ Bь ЬЬ Бъ. 5 rabbits reproduced Generation 21 (Pro.7 BB BB (BB BB) 1, Я-Ф-3 ВВВЬ ВЫ В% Bь - - - - 2 rabberts produce Generation 3] р: 1 BB B B BIB BB BB - О ВЕ В B BB BB BB