Biology / Unit 8 Bio 1705 short lesson, about 20 seconds
Nondisjunction as a Route to Polyploid Speciation
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The idea
Nondisjunction, per Unit 6's Bio 1187, chromosomes failing to separate during meiosis, produces the unreduced gametes underlying both autopolyploidy and alloploidy.
In practice
A gamete with the full diploid number, rather than the normal haploid number, traces to a nondisjunction event during meiosis.
Where people slip
Nondisjunction produces polyploid gametes as a byproduct of a meiotic error — polyploidy is not a separate error itself.
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