03 Meiosis
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- meiosis very drawn out in female = prone to error
- 1 set w/ no chromosomes
- 2nd set w/ 2 chromosomes, 2n, not 1n, 1 copy from father, 1 copy from mother, different from Meiosis 2
- no mixture genes. Only from either mom or dad
- advanced age, longer through meiosis
- ACD: error in mother. CD homologous nondisjunction
- rare
- abnormal gametes from both male and female
- usually normal, unless recessive disease
- acrocentric: centromeres near end, short arm
- long arms link up, both short arms lost
- usually not big deal, lost genes only little, but can give 14:21 to offspring
- father: always normal chromosome
- mother: many possibilities
- mother donate normal: normal
- mother donate 14:21: carrier
- monosomy and trisomy 14 not viable
- many failed pregnancies and spontaneous abortion
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