Archive | Genetics

Crossing Over: Meaning, Significance and Factors | Genetics

In this article we will discuss about:- 1. Meaning of Crossing Over 2. Frequency of Crossing Over 3. Cytological Basis 4. Cytological Proof 5. Significance 6. Factors. Contents: Meaning of Crossing Over Frequency of Crossing Over Cytological Basis of Crossing Over Cytological Proof of Crossing Over Significance of Crossing Over Factors affecting Crossing Over 1. Meaning of Crossing Over: If [...]

By |2016-12-12T07:24:42+00:00December 12, 2016|Crossing Over|Comments Off on Crossing Over: Meaning, Significance and Factors | Genetics

Determination of Chi-Square Test | Genetics

For determining chi-square or goodness of fit, the size of the population must be considered. Suppose in one cross of tall and dwarf plants, out of the 100 plants of F2, 70 are tall and 30 dwarf instead of 75 and 25 as expected from a 3: 1 ratio. Obviously there is a deviation of 5 from the normal. In [...]

By |2016-12-12T07:24:42+00:00December 12, 2016|Chi-Square Test|Comments Off on Determination of Chi-Square Test | Genetics

Morgan’s Work on Drosophila | Genetics

In the early decades of the twentieth century T.H. Morgan and his associates A.H. Sturtevant, H.J. Muller, C.B. Bridges and a few others at Columbia University, New York were actively engaged in studies on Chromosome Theory of Heredity with a very suitable material Drosophila. From their studies on mutants in Drosophila they could assign several genes to chromosomes. For their [...]

By |2016-12-12T07:24:42+00:00December 12, 2016|Genetics|Comments Off on Morgan’s Work on Drosophila | Genetics
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