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Significance of Meiosis

Disjunction i...

Question

Disjunction is ________.

A

Chromosome aberration involving deletion

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B

Modification of gene action by a non-allelic gene

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C

Separation of homologous chromosomes at anaphase

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D

Incompatibility of genes

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Solution

The correct option is C Separation of homologous chromosomes at anaphase
Anaphase-I is a step in meiosis-I. In this phase two chromosomes of each bivalent separate and move towards the opposite poles due to spindle action. In anaphase-II of meiosis-II, the sister chromatids are pulled apart. This separation of homologous chromosomes and sister chromatids in anaphase-I and II respectively is called disjunction.
So, the correct option is 'C'.

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