How the variety occurs in offsprings?

Question

rushwr · Answer

By mutations !

anonymous · Answer

Well it depends, there is more variation in sexual reproduction than in asexual reproduction. This is due to homologous crossover, the switching of 2 of the same alleles for  2 genes. Other wise, mutations or natural selection. Hope this helps.

rushwr · Answer

yeah so mutations occur during segregation of chromosomes.

anonymous · Answer

Mutations don't occur during segregation of chromosomes, they occur during DNA replication!! @rushwr

@twistnflip has a better answer, because most of variation is archieved through the process he described.

However, you might want to add recombination to your answer (which is basically the term for what @twistnflip explained)

rushwr · Answer

http://www.geneticseducation.nhs.uk/mededu/changes-to-dna-affect-gene-dosage-or-function/errors-during-meiosis @neils5x9 It does occur ! :)

rushwr · Answer

@niels5x9 I hope that proves it :)

anonymous · Answer

@rushwr That is not segregation of chromosomes but DNA replication also in practise, very little of the variation is caused by mutations, most by crossing over ;)