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Question 4
2 pts
You calculate the allele frequency for particular gene in ladybugs one year (generation) to be E =
0.6 and e = 0.4. The ten years (many generations) later you calculate allele frequency again and find
E = 0.8 and e = 0.2.
Are the ladybugs in Hardy Weinberg Equilibrium for that trait?
Answer 1
Has evolution occurred?
Answer 2
Answer 1
[ Choose
Answer 2
[Choose ]
A
Question 5

Question 4 2 pts You calculate the allele frequency for particular gene in ladybugs one year generation to be E 06 and e 04 The ten years many generations later class=

Respuesta :

marianaegarciaperedo

A population in Hardy-Weinberg equilibrium expresses the same frequencies through generations. If they change, there is an evolutive force acting, and the population is ev0lving. In the exposed example, the population is not in H-W eq. and it is ev0lving.

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Before answering the question, let us review some framework about the H-W equilibrium.

Assumptions for a population in H-W equilibrium:  

⇒ Random matings

⇒ No superposed generations

⇒ No mutations

⇒ No migration

⇒ Infinite population size  

⇒ No natural selection

According to Hardy-Weinberg,  

  • Assuming a diallelic gene, p and q are the allelic frequencies in a locus and represent the allelic d0minant or recessive forms.  
  • The gen0typic frequencies after one generation are p² (H0m0zyg0us d0minant), 2pq (Heter0zyg0us), q² (H0m0zyg0us recessive).  
  • Populations in H-W equilibrium will get the same allelic frequencies generation after generation.
  • When adding the allelic frequencies of a population in H-W equilibrium, the result should be 1, this is p + q = 1.
  • In the same way, when adding the genotypic frequencies, the result should also equal 1, this is p²+ 2pq + q² = 1

Now that we have already reviewed this information, we can analyze the exposed problem.

Available data:

→ Allelic frequencies, f(x) → Time T₀

  • f(E) = p = 0.6
  • f(e) = q = 0.4

→ Allelic frequencies, f(x) → Time T₁ ⇒ 10 years later

  • f(E) = p = 0.8
  • f(e) = q = 0.2

According to what we previously sow, populations that are in H-W equilibrium should express the same allelic frequencies generation after generation.

However, in this population, we observe a change in allelic frequencies.

This change suggests that there is a force acting on this population that is altering or breaking equilibrium.

Natural selection or any other evolutive force might be modeling this population, altering the allelic frequencies, and driving the population to ev0lve.

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