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If x is the phenotypic ratio of monohybrid cross for trait A and y is the phenotypic ratio of monohybrid cross for trait B, what would be the phenotypic ratio of a dihybrid cross involving traits A and B?

Correct Answer: xy
For a dihybrid cross involving two traits, the independent law of assortment states that the traits would segregate independently of each other. Thus, the phenotypic ratio would be xy.

Three necessary and sufficient conditions that must be satisfied if traits should be unique determinants of the Leadership Index are
1.The trail quality should follow a descending order as one traverse from the highest to the lowest levels.
2. There must be a high correlation between the level of traits and the level of success.
3. The achievement trait curve should be convex to the trait axis as one travels from the low to the high trait terminals.
The above conditions have been suggested by

If round seed (RR) was dominant over wrinkled seed (rr) in a monohybrid cross, and yellow pod (YY) was dominant over brown pod (yy), what should be the starting genotype of parents in a dihybrid cross?

The expected phenotypic ratio obtained by crossing the F1 generation in dihybrid cross would be?

According to Cattell's Trait theory, Cattell identified how many surface traits and source traits respectively?

The phenotypic ratio of monohybrid cross in F2 generation is

What is the phenotypic ratio of F2 generation in a dihybrid cross?

In an experiment with drosophila eye colour purple/red and wing shape normal/vestigial you observe that offspring mainly have either purple vestigial trait or red normal trait. What is the expected parental trait?

The monohybrid phenotypic and genotypic ratio is same in the case of ________________

What is the dihybrid phenotypic ratio for recessive epistasis in an F22 generation?

In a genetic cross between the genotypes WWXX and wwxx, the following phenotypic distributions were observed among the F2 progeny: WX, 562; wx, 158; Wx, 38; and wX, 42. Likewise, a cross between XXYY and xxyy yielded the following results: XY, 675; xy, 175; Xy, 72; and xY, 78. Similarly, a cross between WWYY and wwyy yielded: WY, 292; wy, 88; Wy, 12; and wY, 8. In all the genotypes, capital letters denote the dominant allele. Assume that the F1 progeny were self-fertilized in all three crosses. Also, double cross-over does not occur in this species. Which of the following is correct?