In the Hardy-Weinberg formula for determining a population's genotype frequencies, the 2 in the term 2pq is necessary because.....单项选择题

A

A)  The population is diploid; the root “di” means two.

B

B)  Heterozygotes can come about in two ways.

C

C)  Populations typically double in number eventually (organisms produce more offspring than can survive).

D

D)  Only heterozygotes have two alleles.

E

E). The heterozygous genotype occurs twice as often as either of the homozygous ones combined.

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类似问题

Geneticists are interested in determining whether a population is in Hardy–Weinberg equilibrium. For a particular gene with two alleles, long‑term data indicate that the expected genotype distribution in the population is 49% homozygous dominant, 42% heterozygous, and 9% homozygous recessive. A sample of 1000 individuals is collected from the population. Of these, 520 are homozygous dominant, 410 are heterozygous, and 70 are homozygous recessive. Using a chi‑square goodness‑of‑fit test, determine whether there is evidence that the observed genotype distribution differs from the expected distribution. Calculate the value of the chi‑square test statistic.

Which of the following is not assumed in Hardy-Weinberg Equilibrium?

In a population of giraffes in Hardy-Weinberg equilibrium, the dominant allele D occurs with a frequency of 0.4. What is the frequency of heterozygous individuals?

In a population of gerbils in Hardy-Weinberg equilibrium, the frequency of homozygous recessive individuals is 0.33. What is the frequency of the dominant phenotype?

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