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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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PercySOL PercySOL
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10 years ago Edited: 10 years ago, PercySOL
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on this observation, would you conclude that meiotic nondisjunction is usually due to nondisjunction during  meiosis I or meiosis II?  Explain your reasoning. 
Post Merge: 10 years ago

Almost 80% occur in the first meiotic division. Comes straight from the notes, but can't really use "because the book says" so as reasoning can I?
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10 years ago
Quote from: PercySOL (10 years ago)
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on this observation, would you conclude that meiotic nondisjunction is usually due to nondisjunction during  meiosis I or meiosis II?  Explain your reasoning.

I believe it's during crossing-over, the chromosomes stick together - so Meiosis I.
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