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12 Cards in this Set
- Front
- Back
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When do chromosomes duplicate in Meiosis I?
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Interphase
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What happens in prophase I of meiosis I?
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Homologous chromosomes pair and exchange segmens
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What happens in metaphase I of meiosis I?
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Tetrads line up
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What happens in anaphase I of meiosis I?
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Pairs of homologous chromosomes split up
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What does meiosis I do?
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Separates homologous chromosomes
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What does meiosis II do?
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Separates sister chromatids
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What results from meiosis II?
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Sister chromatids separate and four haploid daughter cells are left
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What is the site of crossing over called?
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Chiasma
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What happens during synapsis?
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Homologous chromosomes are paired
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What are the sources of genetic variation? When do they occur?
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1. Random arrangement of chromosomes at metaphase 1
2. Crossing over at prophase 1 3. Random nature of fertilization |
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When does crossing over occur, and what does it involve?
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At prophase I of meiosis, and it's non-sister chromatids of homologous chromosomes exchanging genetic material
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What participates in fertilization?
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Gametes
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