phuluong2k
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Father genotype AC, mother BD give a child with genotype AAB. Nonjunction most likely occur in
A. Father meiosis I
B. Father meiosis II
C. Mother meiosis I
D. Mother meiosis II
E. Child first mitosis
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| focussed
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ans.D mother meiosis II
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focussed
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| phuluong2k
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Yes, you got it
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| Alina T
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could you please explain?
thanks
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| phuluong2k
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Very big mistake, sorry focussed :?
The answer is father meiosis II, not mother
Fist child genotype is AAB :arrow: Disorder is a double AA :arrow: Father origin
In first meiotic nondisjunction :arrow: abnormal AC
In second meiotic nondisjunction :arrow: abnormal AA or CC
(mnemonic: a double the same gene :arrow: Second meiotic nondisjunction )
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| Alina T
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that's more like it!! I was wondering.....
thanks
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| focussed
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thanks for the explanation
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