Lecture+2+Topic+II+Transmission+Genetics+I

Lecture+2+Topic+II+Transmission+Genetics+I - zygotene...

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During the formation of gametes, the paired characters ( alleles ) segregate (or separate) equally so that half of the gametes receive one allele and half of the gametes receive the other member of the pair.
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Unformatted text preview: zygotene prophase I are not distributed throughout the nucleus but paired into bivalents (paired homologs). The number of bivalents seen in this stage equal the haploid number of the organism. ! There is no pairing of homologous chromosomes in mitosis. In meiosis pairing of homologous chromosomes starts in zygotene and becomes visible in pachytene . ! In meiosis, the homologous chromosome pairs align themselves at the metaphase plate of metaphase I while in mitosis, chromosomes align at the metaphase plate separately, not in pairs....
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Lecture+2+Topic+II+Transmission+Genetics+I - zygotene...

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