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Oksanka [162]
3 years ago
11

In this Gizmo, only one crossover is allowed in each segment. In reality, crossovers can occur at almost any point along the chr

omosome. How do the random distribution of chromosomes and crossovers create more variation in the resulting gametes?
Biology
1 answer:
nikitadnepr [17]3 years ago
5 0

Answer:

Meiosis and Genetic Variation.

Explanation:

When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between non-sister chromatids of homologous chromosomes. It results in new combinations of genes on each chromosome.

When cells divide during meiosis, homologous chromosomes are randomly distributed during anaphase I, separating and segregating independently of each other. This is called independent assortment. It results in gametes that have unique combinations of chromosomes.

In sexual reproduction, two gametes unite to produce an offspring. But which two of the millions of possible gametes will it be? This is likely to be a matter of chance. It is obviously another source of genetic variation in offspring. This is known as random fertilization.

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