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02-Nov-2017 21:18

(Note that intraspecific crosses (matings in the same species) always produced male and female offspring)) Therefore they concluded that the microorganisms made it unable for the sperm from a different species of wasp to fertilize the females egg. In this post I describe a paper presented in the July 12, 1990 issue of Nature dealing with sexual selection in katydids (an insect).I am going to break this up into two articles, one to outline the underlying theory and another to describe the experiment.Many species tend to have limited diets and habitat requirements, and an organism must compete with members of his own species to secure these necessities.Of primary importance, however, is procuring a mate.

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This was first demonstrated to occur by Guy Bush working on the Apple maggot fly Rhagoletis pomenella.This could occur for many reasons, for example mating rituals grew different or chromosome numbers changed etc. In any case the end result would be that the two lineages could no longer interbreed if they encountered each other.(Incidentally this type of speciation is called allopatric speciation).I have edited some portions of these posts to compress the file.I would like to thank David Paschall-Zimbal for mailing me a copy of #1 (I had not saved it).

This was first demonstrated to occur by Guy Bush working on the Apple maggot fly Rhagoletis pomenella.

This could occur for many reasons, for example mating rituals grew different or chromosome numbers changed etc. In any case the end result would be that the two lineages could no longer interbreed if they encountered each other.

(Incidentally this type of speciation is called allopatric speciation).

I have edited some portions of these posts to compress the file.

I would like to thank David Paschall-Zimbal for mailing me a copy of #1 (I had not saved it).

In their paper they sequenced a 363 bp part of the cytochrome b gene and a 440 bp segment of mitochondrial DNA from what is called the control region.