Middle School

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The graph shows the frequency of two alleles for a genetic trait in a population.


A graph entitled Frequency of 2 Alleles in a Population has generation number on the horizontal axis, and frequency on the vertical axis, from 0 to 1. Allele Upper A has a 0.5 frequency at generations 1, 2, 3 and 4. It has a 0.45 frequency at generation 5. Allele a has a 0.5 frequency from Generations 1 through 4 and then has a frequency of 0.55 at generation 5.


In which generation(s) was the population in Hardy-Weinberg equilibrium for these two alleles?

generation 1 only

generation 5 only

generations 1–4

generations 1–5


Answer is C! :)

The graph shows the frequency of two alleles for a genetic trait in a population A graph entitled Frequency of 2 Alleles in a Population

Answer :

The population was in Hardy-Weinberg equilibrium from generation 1 to 4. Option C). During this time, allelic frequencies remained the same.

What is the Hardy-Weinberg equilibrium?

The Hardy-Weinberg equilibrium is a theory that states that allelic and genotypic frequencies remain the same through generations.

No evolutive forces are acting on these populations. This is, there is no

  • Mutation
  • Natural selection
  • Genetic drift
  • Gene flow
  • Mating by selected genotype/phenotype

These populations are in equilibrium because they are not evolving.

Assuming a diallelic gene,

⇒ The allelic frequencies in a locus are represented as p and q.

• The frequency of the dominant allele p(X) is p

• The frequency of the recessive allele p(x) is q

⇒ The genotypic frequencies after one generation are

• p² (H0m0zyg0us dominant genotypic frequency),

• 2pq (Heter0zyg0us genotypic frequency),

• q² (H0m0zyg0us recessive genotypic frequency).

The addition of the allelic frequencies equals 1

p + q = 1.

The sum of genotypic frequencies equals 1

p² + 2pq + q² = 1

According to this information, the proposed population was in Hardy-Weinberg equilibrium from generation 1 to 4. During this time, allelic frequencies remained the same. Only in the fifth generation, there was a shift in allelic frequencies.

Option C) is correct. generations 1–4

You will learn more about hardy-weinberg equilibrium at

https://brainly.com/question/16823644

https://brainly.com/question/14669053

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Rewritten by : Barada

Answer:

C

Explanation:

the question a biologist is most likely to ask after seeing this graph is, Is there a theory that explains the results in the graph?