2024年11月11日 · Directional selection in the modern horse is demonstrated by. Multiple Choice. the rapid decrease in size over the last 200 ?years. fossils which show the horse has not changed in millions of years. the extinction of other horse species. populations consisting of only very dark and very light colored horses.

2023年5月31日 · On the other hand, directional selection occurs when individuals with a particular extreme phenotype are favored, causing a shift in the average phenotype over generations. This results in both a change in the mean phenotype and an increase or decrease in phenotypic variation, as the population adapts to new environmental conditions or ...

The population will undergo stabilising selection if natural selection promotes an average phenotype by selecting against extreme diversity. Natural selection will favour individuals who blend in best with the forest floor and are less likely to be detected by predators in a population of mice that live in the woods, for example.

2024年12月21日 · Which of the following is an example of directional selection? An allele that contributes to fat production decreases slightly in a population every generation due to random mutations. An allele that contributes to fat production increases in a population because birds with more body fat are more likely to survive during harsh winters.

2024年6月25日 · Directional selection in the modern horse is demonstrated by. Multiple Choice. populations consisting of only very dark and very light colored horses. the rapid decrease in size over the last 200 ?years. the gradual increase in size over millions of years. fossils which show the horse has not changed in millions of years.

2024年11月21日 · - This scenario is an example of directional selection. The darker form of the moth is favored by natural selection because it provides better camouflage, leading to higher survival rates and increased reproductive success. Over time, this selective pressure results in a shift towards the darker form becoming more prevalent in the population. 4.

2024年8月9日 · Which of the following does directional selection favour? O A) Heterozygotes B) Phenotypes at one end of the distribution C) Intermediate phenotypes C D) Phenotypic extremes at both ends of the distribution E) Recessive alleles

Directional selection: A type of selection that selects against one of two extremes and results in a change in a characteristic over time. For example, a severe drought in 1977 wiped out most of the vegetation that fed one island's population of seed-eating ground finches, Geospiza fortis, lowering the population from 750 to 90.

What is directional selection? o environmental influences that select against change o environmental influences that promote two or more phenotypes versus all others o environmental influences that promote one phenotype versus all others  

Word Bank: Directional selection Disruptive selection Stabilizing selection Bottleneck effect Founder effect Gene Flow Genetic Drift Natural Selection Sexual Selection Variation occurs when individuals migrate 7 in and out of a occurs when organisms with certain traits are more likely to …