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(B) $X -$ Crossing over,which occurs during meiosis,leads to genetic recombination,which is essential for the process of evolution.$Y -$ Crossing over

Vedclass · Accepted Answer

Both are true for meiosis.

Vedclass · Answer

(B) $X -$ Crossing over,which occurs during meiosis,leads to genetic recombination,which is essential for the process of evolution.$Y -$ Crossing over is defined as the exchange of genetic material between non-sister chromatids of homologous chromosomes during the pachytene stage of prophase-$I$ of meiosis.Since both statements describe processes or characteristics specific to meiosis,option $B$ is the correct answer.

$X -$ It is very important for the process of evolution.
$Y -$ Crossing over is the exchange of genetic material between two homologous chromosomes.

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$X -$ It is very important for the process of evolution.$Y -$ Crossing over is the exchange of genetic material between two homologous chromosomes.