Crosses in garden pea

Garden pea producing round seeds were crossed with those producing wrinkled seeds. The result was the production of 5474 round seeds and 1850 wrinkled seeds. a) What is the original parental cross? b) Indicate the gamete types c) F1 progeny? d) What result do you expect when F1 is selfed? e) Indicate F1 selfed gametes f) What are the expected phenotypes, genotypes, genotypic frequency and phenotypic ratio?

Prediction of crosses and calculating deviation between white and grey mice

A white albino mouse was crossed with a wild grey colored one. The first generation mice were all grey. In the second generation, there were 198 grey and 72 albino mice. a) What can you hypothesize from these results? b) On the basis of your hypothesis compare the observed results with those expected.

F2 progeny ratio

In squash, disc shaped fruit is dependent on dominant gene D and elongated fruit on recessive allele d. Yellow color is controlled by dominant gene R and green color by recessive allele r. Draw a cross between the homozygous squash fruits and summarize the expected results of F2.

Epistasis

White fruit color in summer squash is dependent on dominant allele W and colored fruit on recessive allele w. In the presence of ww and a dominant gene G, the color of the fruit is yellow. When G is absent, ie., when its gg, then the color is green. What F2 phenotypes and proportions are expected when a white fruit WWGG is crossed with a green fruit wwgg?

chi-square testing

Cross between pure red tomato and yellow tomato produced all red F1 progeny. From the F2 progeny of 400 plants, 90 were yellow. Hypothesize that a single pair of allele is involved such that Y- = Red and yy = Yellow. Test this hypothesis using Chi square test.