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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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lexitrae lexitrae
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12 years ago
What is the term applied to the mechanism whereby an extra chromosome is left in a daughter cell following meiosis?
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#1
12 years ago
mutation?
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#2
12 years ago
there are different names for each chromosome, extra chromosome 13 is trisonmy-13 syndrome, extra chromosome 21 is down dyndrome, extra X chromsome is kinefeler syndrome.
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#3
12 years ago
Non-disjunction

There can either be non-disjunction in meiosis I or meiosis II. Each having its own outcome. The following picture is pretty good to imagine whats happening.

Non-disjunction is the cause of diseases such as Trisomy 21 (down syndrome. trisomy 21 is when a person has an extra chromosome 21

http://www.anselm.edu/homepage/jpitocch/genbio/nondisjunction.JPG
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lexieleighxolexieleighxo
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12 years ago
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