linkage and crossing over genes are alternative of each other . justify with the help of an example
Answers
Linkage is the tendency of certain loci or alleles (genes) to be inherited together while, crossing over is the segregation of genes, e.g. the genes on a chromosome either follow linkage path or cross over, to form the gametes during gametogenesis in human.
In Drosophila a yellow bodied white eyed female was crossed with brown bodies red eyed male, F1 progeny produced and inter crossed the F2 phenotypic ratio of Drosophila deviated significantly from Mendel’s 9:3:3:1, the genes for eye colour and body colour are closely located on the ‘X’ chromosome showing linkage and therefore inherited together, recombinants were formed due to crossing over but at low percentage.
Answer:
Explanation:the inheritance of genes of the same chromosome together and capacity of the genes to retain their parental combination in subsequent generation is known as linkage