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6 Cards in this Set
- Front
- Back
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When does crossing over occur?
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When homologous chromosomes pair up during Prophase I
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Sex-linkage
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- affected makes will pass the gene to ALL daughters
- sex-linked recessive affect only males; cannot be passed from father to son, but skip a generation (father to grandson) bia a daugher who is a carrier |
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Nondisjunction
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Failure of homologous chromosomes to separate during meiosis I or II
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XXY
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sterile males
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XXX
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infertile females
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XYY
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normal males, but taller than afferage
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