During the studies on genes in Drosophila that were sex-linked T.H. Morgan found F2-population phenotypic ratios deviated from expected 9 : 3 : 3 : 1. Explain the conclusion he arrived at.

During the studies on genes in Drosopila that were sex-linked T.H. Morgan found F2-populabon phenotypic ratios deviated from expected 9 : 3 : 3 : 1. Explain the conclusion he arrived at.

Morgan carried out several dihybrid crosses in Drosophila and found F_(2) -rations deviated very significantly from the expected Mendelian ratio. Explain his findings with the help of and example.

Assertion : When yelow bodied, white eyed Drosophila females were hybridised with brown-bodied, red eyeed males , and F_(1) progeny was intercrossed, F_(2) ratio deviated from 9:3:3:1 Reason : When two genes in a dihybrid are on same chromosome, the proportion of parental gene combinations are much higher than the non-parental type

In a typical monohybrid cross the F_(2) -population ratio is written as 3:1 for phenotype but expressed as 1:2:1 for genotype. Explain with the help of an exmaple.

In a typical monohybrid cross the F_(2) -population ratio is written as 3:1 for phenotype but expressed as 1:2:1 for genotype. Explain with the help of an exmaple.

Define epistasis and give one example of this phenomenon. How is the phenotypic ratio of F_2 generation in epistasis different from the normal 9:3:3:1 ratio?