A) repulsion
B) recombination
C) linkage
D) crossing over
Correct Answer: C
Solution :
W Bateson (1905) explained the lack of independent assortment in sweet pea and T H Morgan (1910) in Drosophila due to linkage. When genes closely present adhere or link together in a group and transmitted as a single unit, the phenomenon is called linkage. It stops the process of independent assortment. Incomplete linkage is broken down due to the crossing over. Repulsion is an arrangement in a double heterozygote where a wild type allele of one gene is adjacent to a mutant allele of another gene on the same homologous chromosome. Recombination is the arrangement of genes during meiosis so that a gamete contains a haploid genotype with a new gene combination. Crossing over is a process occurring in the diplotene stage of prophase-I of meiosis in which, there is exchange of non-sister chromatids, producing genetic recombination.
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