What term refers to the failure of homologous chromosomes to separate during meiosis I?Multiple choice question.Crossing overNondisjunctionDiploidSynapsis
Question
What term refers to the failure of homologous chromosomes to separate during meiosis I?
- Crossing over
- Nondisjunction
- Diploid
- Synapsis
Solution
Answer
The term that refers to the failure of homologous chromosomes to separate during meiosis I is Nondisjunction.
Nondisjunction occurs when the homologous chromosomes (or sister chromatids) do not separate properly during cell division, leading to a gamete with an abnormal number of chromosomes. This can result in conditions such as Down syndrome, which is caused by an extra copy of chromosome 21.
Crossing over refers to the exchange of genetic material between homologous chromosomes during meiosis, diploid describes a cell that has two complete sets of chromosomes, and synapsis is the process of pairing homologous chromosomes during meiosis.
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