What are the 2 mechanisms of speciation and how are they...

Transcript

00:01 Hi students now we will talk about a speciation.

00:04 Speciation is nothing but the formation of the new species from the existing species or you can say that the existing species are split into two different types of the species so based on the geographical relationship of new species with the pre -existing species it is of two types.

00:26 So one is known as a sympathetic speciation and the second one is known as allopatric speciation so let's see the sympathetic species first so formation of the species within a single population without a geographical isolation is called as sympathetic speciation for say here it's a very large area and here there are a group of organisms and here there is a group of organisms and here these is a group of organisms now this organisms will evolve into one species this into another species and this into another species remember there is no geographical isolation is present and most of the cases this is due to a emergency of emergence of polyploidy when the polyploid condition arises the one species and another with individuals of the same species cannot you know related because of the polyploid condition eventually that results into a development of the angio species or you can see the other one is suddenly there is a change in the genitalia is taken place okay change in the genitalia shape so that will become incompatible or there might be the behavior at isolation so there might be anything that is possible but without geographical isolation that is sympathetic and then next one is allopatic speciation i'm sorry the changing genitalia and the behavioral isolation is for prevention of the hybrid formation not in a same species so here it's a polyproid is an example that is in a appliance the next one in allopatric speciation in allopatric speciation what happens is that there is a geographical barrier will come into a picture there is no geographical barrier in case of sympathetic speciation but the allopatric speciation is having the geographical barrier.

02:29 So the single population is divided into two types...

Question

what are the 2 mechanisms of speciation and how are they different from each other ?

Question

what are the 2 mechanisms of speciation and how are they different from each other ?

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