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77julia77 [94]
3 years ago
12

If the environmental situation changes is it possible for a population to be restored?​

Biology
1 answer:
klasskru [66]3 years ago
8 0

yes it is possible but it would depend on the enviromental situation before and after

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What is the most significant role of homologous recombination in eukaryotes that is not found in prokaryotes? exchange of geneti
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Answer:

The correct answer is "exchange of genetic information between parental chromosomes".

Explanation:

Homologous recombination is a genetic recombination that occurs when two similar or identical molecules of DNA exchange some of its nucleotide sequences. This type of recombination is most widely used for DNA repair purposes, however this is not distinctive of eukaryotes as prokaryotes use it as well. Therefore the most significant an unique role of homologous recombination in eukaryotes is the exchange of genetic information between parental chromosomes. This particular function is known as chromosomal crossover and it is only found in eukaryotes.

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Heterozygote advantage occurs when heterozygotes have a higher fitness than do both homozygotes. In frequency-dependant selection, the fitness of a phenotype declines it it becomes too common in the population.

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The heterozygotes have both alleles, which is needed for genetic variation. Heterozygotes are essential for there to be genetic variation in a population. In other words it is when When a single copy of a disease allele doesn't result in a disease but instead is good for the person or organism that carries it, we say that allele has a heterozygote advantage. For example a sickle cell trait, which protects against malaria in heterozygotes, but causes a deadly disease in homozygotes.

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