Which of the following phenomena leads to var | vedclass

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(C) Mutation refers to a sudden,heritable change in the genetic material $(DNA)$ sequence,which introduces new alleles into a population.Recombination

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Mutation,recombination

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(C) Mutation refers to a sudden,heritable change in the genetic material $(DNA)$ sequence,which introduces new alleles into a population.Recombination occurs during meiosis (crossing over) and results in new combinations of genes that are different from the parental combinations.Both mutation and recombination are primary sources of genetic variation in organisms.Linkage,on the other hand,tends to keep genes together and reduces the frequency of recombination,thereby limiting variation.

Column-$I$	Column-$II$
$(A)$ Dominance	$(i)$ Many genes govern a single character
$(B)$ Codominance	$(ii)$ In a heterozygous organism only one allele expresses itself
$(C)$ Pleiotropy	$(iii)$ In a heterozygous organism both alleles express themselves fully
$(D)$ Polygenic inheritance	$(iv)$ $A$ single gene influences many characters

Which of the following phenomena leads to variation in $DNA$?

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