Q.

Which one of the following always not true for the behaviour of genes.

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a

Alleles of a gene segregate at the time of meiosis for gamete formation.

b

Segregation of a pair of genes is always independent of another pair of genes.

c

In diploid organism genes occur in pairs.

d

Closely linked genes seldom segregate.

answer is C.

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Detailed Solution

If genes are present on two different chromosomes, segregation of a pair of genes is independent of another pair of genes present on another chromosomal pair. If the two different gene pairs are present on the same homologous chromosomes, the two types of genes usually move together during gamete formation unless there is crossing over between them. 

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