Sat March 03, 2012 By: Ashok Sharma

Why do variations occur in sexual reproduction?

Expert Reply
Mon March 05, 2012
In sexual reproduction, the offsprings receive some genes from mother and some from father. Each gamete (sperm or egg) contains a mixture of genes from two different parents. Crossing-over and Independent assortment promote variation. During fertilisation, mixing of maternal and paternal genes in various combinations occur.
Hence the offspring will exhibit genetic variations and will not be identical to their parents or to one another. 
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