crossing over


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crossing over

 
the exchanging of material between homologous chromosomes, during the first meiotic division, resulting in new combinations of genes.

crossing over

/cross·ing over/ (kros´ing o´ver) the exchanging of material between homologous chromosomes during the first meiotic division, resulting in new combinations of genes.

crossing over

or

crossing-over

(krô′sĭng-ō′vər, krŏs′ĭng-)
n.
The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.

crossing over

the exchange of sections of chromatids between homologous pairs of chromosomes during the prophase stage of the first meiotic division. Crossing over occurs through the formation of chiasmata and results in the recombination of genes. Also called chiasmatypy.
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Crossing over

crossing over

Recombination Vox populi A popular phrase for a change in a person's sexual preference, usually heterosexual → homosexual
Crossing overclick for a larger image
Fig. 123 Crossing over . The exchange of chromatid material.

crossing over

a process occurring in the DIPLOTENE stage of Prophase 1 of MEIOSIS in which there is exchange of nonsister CHROMATIDS, producing genetic RECOMBINATION. (see Fig. 123 ). See also UNEQUAL CROSSING OVER.

crossing over

the exchanging of material between homologous chromosomes, during the first meiotic division, resulting in new combinations of genes.