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Leviafan [203]
3 years ago
8

A mutation may be passed along to human offspring

Biology
2 answers:
ch4aika [34]3 years ago
8 0
B) through meiosis only
likoan [24]3 years ago
6 0

Answer:

The correct answer would be B) through meiosis only.

Any mutation in human being can pass onto the next generation only when it is present in germ cells.

Germs cells are the cells which lead to the formation of gametes (sperm in males and egg in females) through meiosis. It results in the formation of four haploid cells (gametes) from a single parent germ cell.

Mutation in somatic cells (divide by mitosis) will pass onto the daughter cells in the organism but will pass on to the next generation.

Hence, meiosis is the process by which a mutation may pass onto next generation in human beings.

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Consider a locus with two alleles - B and b. B is dominant, while b is recessive. There is no mutation. B has a selective advant
Marat540 [252]

Answer:

0.09

Explanation:

<h3><u>Before selection</u></h3>

Total number in population = 1000

Genotype frequencies

Genotype frequency of BB = 500/1000 = 0.5

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Genotype frequency of bb = 250/1000 = 0.25

Allele frequencies

Allele frequency of B = BB genotype frequency + half of the Bb genotype frequency = 0.5 + (0.25/2) = 0.625

Allele frequency of b = bb genotype frequency + half of the Bb genotype frequency = 0.25 + (0.25/2) = 0.375

<h3><u>After selection</u></h3>

We are told that after selection, the genotype frequency of bb is changed as they become 50% less fit. This means the frequency of bb individuals changes from 250 to 125 individuals (50% reduction).

Now the total number of individuals is 500 + 125 + 250 = 875.

Genotype frequencies

Genotype frequency of BB = 500/875 = 0.57

Genotype frequency of Bb = 250/875 = 0.29

Genotype frequency of bb = 125/875 = 0.14

Allele frequencies

Allele frequency of B = BB genotype frequency + half of the Bb genotype frequency = 0.57 + (0.29/2) = 0.715

Allele frequency of b = bb genotype frequency + half of the Bb genotype frequency = 0.14 + (0.29/2) = 0.285

<h3><u>Change in frequency of B after 1 generation</u></h3>

0.715 - 0.625 = 0.09

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Explanation:

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