The phenomenon that fails to separate homologous chromosomes during meiosis is known as

Non-disjunction

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Translocation

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Mutation

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Crossing over

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Disjunction

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Solution

The correct option is D Non-disjunction
Nondisjunction is the failure of separation of sister chromatids or homologous chromosomes during anaphase. Disjunction is the separation of sister chromatids during anaphase. Crossing over is an exchange of genetic material between non-sister chromatids of the homologous pair. Mutation refers to sudden changes in genetic material. Exchange of chromosomal segment between two non-homologous chromosomes is called translocation. So, the correct answer is B.

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Q. ................ is the failure of homologous chromosomes to separate during meiosis.

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During which phase of meiosis do homologous chromosomes separate?

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Question 4
During Anaphase - I of meiosis
(a) homologous chromosomes separate
(b) non-homologous autosomes separate
(c) sister chromatids separate
(d) non-sister chromatids separate

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