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Jobisdone [24]
3 years ago
11

how does codominance at the molecular level help to explain why evolutionary processes haven't resulted in the elimination fo th

e ickle-cell among people of african descent
Biology
1 answer:
Yanka [14]3 years ago
8 0

Answer:

here.

Explanation:

Due to the prevalence of malaria in Africa, the allele for sickle cell anemia (HbS) provides a selective advantage. That's why it remains in the population.

A normal African person (HbAHbA), with normal haemoglobin, will not die of anemia, but will die of malaria.

An African person with sickle cell anemia (HbSHbS), with abnormal haemoglobin, will die of anemia.

A heterozygous African person (HbAHbS), with half of his red blood cells (RBCs) being normal and the other half being sickle-shaped, will neither die from anemia, nor malaria since the plasmodium will be incapable of completing its life cycle in the abnormal RBCs.

Thus heterozygous African people will grow, reproduce and pass on the HbS allele to the next generations.

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Some types of gene are more highly conserved than others since their pathways or phenomena are fundamental to the growth and pro
Dmitriy789 [7]

Answer: Sugar metabolism , DNA replication  and lipid synthesis.

Explanation:

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These processes are fundamental to life and is vital for the growth and development of the organism. The cell proliferation and growth is also very essential in case of bacteria.

hence, these processes are highly conserved from one species to another species.

4 0
3 years ago
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Explanation:

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Which were likely the closest to early animals?
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Answer: B.   The amount of living organisms would increase.

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8 0
2 years ago
What is affected in a germ cell mutation?
Misha Larkins [42]

What is a germ cell mutation?

A germline mutation, or germinal mutation, is any detectable variation within germ cells (cells that, when fully developed, become sperm and ovum). Mutations in these cells are the only mutations that can be passed on to offspring, when either a mutated sperm or oocyte come together to form a zygote.

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