Cell divisions - meiosis
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Last updated 7:24 PM on 9/12/22
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9 Terms
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Mitosis
________ and reproduction:: produces haploid gametes so organisms have a full number of chromosomes after fertilisation.
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Independent segregation
________:: random separation of homologous chromosomes to produce genetic diversity.
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meiosis
form of cell division that results in four genetically different daughter cells (gametes, haploids), includes two divisions
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Meiosis and reproduction
produces haploid gametes so organisms have a full number of chromosomes after fertilisation
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Meiosis I
first stage of meiosis, homologous chromosomes pair, crossing over occurs at chiasmata, cell divides into two, independent segregation of homologous chromosomes
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Homologous chromosomes
pair of chromosomes with genes at same locus, some alleles may be the same while others are different
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Crossing over
occurs at chiasmata, homologous chromosomes cross over and alleles are exchanged at equivalent portions of chromatids to create genetic variation
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Independent segregation
random separation of homologous chromosomes to produce genetic diversity
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Meiosis II
second stage of meiosis, independent separation of sister chromatids, each cell divides again to produce four haploid cells