Question

Give significance of crossing over.

Answer 1

Here is your answer!

In Meiosis , crossing over or mixing up of genes occurs

When the maternal and paternal chromosomes are seperating , the chromatid materil very often gets exchanged between the two members of homologous chromosomes. This is known as crossing over .

Importance of crossing over :

(i) Crossing over results in genetic recombination in the newly formed cell.

(ii) The mixing up of genes during meiotic division provides for innumberable variations in the progeny. That is how the children of the same parents are different from each other in certain respects.

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Answer 2

The importance of crossing-over is in the generation of genetic diversity in the resulting gametes. New, genetically recombined sex cells are created. This leads to variation among offspring. Any given genetic combination can be advantageous or disadvantageous, but genetic variability of offspring increases the likelihood that at least some of the offspring will survive in an ever-changing environment.