Disjunction refers to

The separation of homologous chromosomes at anaphase I

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The type of chromosomal aberration in which there is loss of a part chromosome

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Incompatibility in fungi and other thallophytes

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Modification of gene action by a nonallelic gene.

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Solution

The correct option is C The separation of homologous chromosomes at anaphase I
The homologous chromosomes break their connections and separate out during anaphase I of meiosis I. This process of separation is named as disjunction.
So, the correct answer is 'The separation of homologous chromosomes at anaphase I'.

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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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