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Discuss in detail the contributions of Morgan and Sturvant in the area of genetics.
Answers (1)
Sturtevant was one of the students of Morgan. Morgan has carried out several experiments related to genetics. Some of their contributions are:
- In the various dihybrid crosses of Drosophila carried out by Morgan, it was observed by him that the phenotypic ratio did not resemble the standard ratio, which was observed by Mendel. Morgan and his group noticed that the genes did not show independent segregation when they were located on the same chromosome as they were aware that genes were located on the X chromosome. Morgan termed the interaction of genes on the same chromosome as linkage and generation of non-parental combination as recombination. On the same chromosome, the probability of parental combination is much higher than that of non-parental combination.
- Sturtevant discovered that on the same chromosome, recombination or lack of recombination was largely dependent on the relative distance between the two genes. There was no recombination when genes were tightly linked, and chances of recombination were higher when genes had a large distance between them.
Contributions made by Morgan and his group, including Sturtevant, contributed hugely to the development of the genetic mapping.
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