if 2n is four, then number of possible combinations of chromosomes in the resulting gametes, excluding any crossing-over, is:

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08-11-2022
Biology

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if 2n is four, then number of possible combinations of chromosomes in the resulting gametes, excluding any crossing-over, is:

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contexto1212 contexto1212 · Answer 1 · 2022-11-15T01:48:10-05:00

In a diploid body cell, there are 2n = 4 chromosomes—2 from the mother and 2 from the father.

The exchange of genetic material between the non-sister chromatids of two homologous chromosomes during sexual reproduction, or chromosomal crossover, leads to recombinant chromosomes. Genes from the mother and father typically "cross over" or are scrambled to create a genetic mix particular to each baby. However, because the Y chromosome does not experience crossing over, its genes have a propensity to age prematurely and repetitive DNA sequences build up.When two non-sister chromatids on homologous chromosomes exchange genetic material during sexual reproduction, recombinant chromosomes are created. This process is known as chromosomal crossover, or crossing over.

Learn more about to chromosomes visit here: https://brainly.com/question/16872411

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