Question

origin of mechanism of reproductive isolation in drosophilla

Answer 1

In the origin and maintenance of race and species, isolation is an indispensable factor and its role and importance have been recognized for a long time. Even Lamarck and Darwin pointed out that interbreeding of different populations may result in swampimg of the differences acquired during the process of evolutionary divergence. During the process of speciation the diverging populations must acquire some means of isolation so that the genes from one gene pool are prevented from dispersing freely into foreign gene pool. Reproductive isolating mechanisms prevent exchange of genes between Mendelian populations by genetically conditioned mechanisms which are intrinsic to the organisms themselves. Thus, the origin of reproductive isolating mechanisms is an important event in the process of cladogenesis (speciation).
The origin of reproductive isolating mechanisms is an.... Available from: https://www.researchgate.net/publication/226611909_The_origin_of_reproductive_isolating_mechanisms_is_an_important_event_in_the_process_of_speciation_Evidences_from_Drosophila [accessed Apr 25 2018].