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igomit [66]
3 years ago
11

Following a flood, migration from neighboring populations alters genotypic frequencies of a population of river-bottom midges. A

ssuming that the conditions for Hardy–Weinberg subsequently are met, how many generations of random mating are required to restore the genotypic frequencies to Hardy–Weinberg equilibrium?(A) Between 3 and 10(B) Between 11 and 20(C) 2(D) 1(E) More than 20
Biology
1 answer:
sveta [45]3 years ago
6 0

Answer: D

Explanation: Hardy-Weinberg (H-W) principle assumes the following;

1. Random mating

2. No migration

3. No selection

4. No mutation

5. Large population

When genotype frequencies in a population deviate from H-W principle, it takes only one (1) generation of random mating to H-W equilibrium if the above assumptions hold, that the frequencies in males and females are equal and that the locus is autosomal.

In the case of different allele frequencies between the sexes, it will take two (2) generations of random mating to H-W equilibrium.

Also, it will take multiple generations to attain equilibrium for sex-linked loci because one sex has two copies of the gene and the other sex has only one.

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If your parents smoke, you're ________ more likely to start smoking than a child of nonsmokers.
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Which of the following is not an abiotic limiting factor?
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You've been experiencing acid indigestion lately, and you'd like a quick fix for the problem. You do a little research on the In
Licemer1 [7]

Answer:

<em>C: After 1 hour, the pH of the solution in the PEPCID AC beaker was 9.2 and the pH of the solution in the Alka-Seltzer beaker was 8.3</em>

Explanation:

The degree of acidity or alkalinity/basicity of a substance is its pH. The value of pH ranges from 1 to 14 with the former being extreme acidity and the latter being extreme alkalinity while pH 7 is considered neutral.

Hence, any pH below 7 is considered acidic and above 7 is considered alkaline.

Reactions involving equal volumes of an acid and a base can end in acidic, alkaline or neutral pH depending on the strength of the acid/base involved;

  • Equal volumes of strong acid with strong base will result in neutral pH
  • Equal volumes of weak acid with strong base will result in alkaline pH
  • Equal volume of strong acid with weak base will result in acidic pH

If substance A and B reacts with equal volume of the same acid under the same condition and the end result of A is a solution with pH of 9.2 and that of B is a pH of 8.3, it simply means substance A is a stronger base than substance B.

<em>Hence, the only outcome that supports the hypothesis that a tablet of PEPCID AC can neutralize more stomach acid than a tablet of Alka-Seltzer is that the pH of the solution in the PEPCID AC beaker was 9.2 and the pH of the solution in the Alka-Seltzer beaker was 8.3 after being subjected to the same condition.</em>

If an indigestion is due to excess stomach acid, the only way to reduce the acidity is to consume a substance that will decrease the degree of acidity in the stomach. This means that the patient will need to consume something that is alkaline in order to increase the pH.

8 0
3 years ago
Which of these values would most likely be the heritability of body mass index (BMI) in a developing country with a large gap be
ANTONII [103]

Which of these values would most likely be the heritability of body mass index (BMI) in a developing country with a large gap between nutrition and health care available to the rich and poor?

a. 0.33

b. -0.88

c. 0.99

d. 0.0001

e. 1.3

Answer:

a. 0.33

Explanation:

Body Mass Index is defined as the measure of fat depending on the height and weight of individuals. It is being calculated as: BMI=\frac{mass_{kg}}{height_{m^2}}

The most likely heritability of body mass index(BMI) in a developing country with a large gap between nutrition and health care will be 0.33.

These is because in developing countries especially countries experiencing rapid economic growth as illustrated by the annual GDP growth rate are likely to have widely ranging lifestyles due to influences of the burgeoning economy, Therefore, there are greater chances for the rich  to have access to the basic requirements and necessities of life whereas the poor are limited with either low or no access to adequate nutrition and health care.

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