Briefly mention the contribution of T.H. Morgan in genetics.

Explanation

1. T.H. morgan worked on Drosophila melanogaster for experimental verification of the chromosomal theory of inheritance to discover the basis for the variation that sexual reproduction produced.
2. He also carried out dihybrid crosses in Drosophila to study the independent inheritance of two pairs of characters. He formulated the chromosomal theory of linkage. He defined linkage as co-existence of two or more genes in the same chromosome. His experiments have also proved that tightly linked genes show very low recombination while loosely linked genes show higher recombination.
3. T.H morgan worked on Drosophila melanogaster to analyse the behaviour of the two alleles of a fruit fly.s eye- colour gene and he discovered sex linked inheritance.
4.Morgan discovery that transmission of X-chromosome in Drosophila correlates with the inheritance of an eye colour trait was the first solid evidence indicating that a specific gene is associated with a specific chromosome.