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How does crossing over add to the genetic diversity of sexually reproducing organisms?
It involves segments of two homologous chromosomes trading places.
It involves random segregation of the homologous chromosomes to each daughter cell.
It involves fertilization of an ovum by any one out of millions of sperms.

Respuesta :

shaniacommander
rossover is the first way that genes are shuffled to give rise to genetic diversity. Crossover takes place in sexual reproduction. Chromosomes line up side by side and break off pieces of themselves, then trade those pieces with each other. When they break at the same place (locus) in the sequence of base pairs, the result is an exchange of genes called genetic recombination. That is the normal way for crossover to occur. Genetic recombination ensures that the daughter cells produced have a different genetic makeup from the parent cell and thus diversity is created.

Answer:

It involves segments of two homologous chromosomes trading places.

Explanation:

Crossing over is the process of exchange of genetic segments between two non-sister chromatids of a homologous chromosome pair. It occurs in pachytene of prophase I of meiosis I. The exchange of segments between non sister chromatids of a homologous chromosome pair creates new gene combinations. So, crossing over creates genetic diversity by adding new gene combinations to gametes.

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