Wednesday, December 4, 2013

LC Biology - Dihybrid Cross Problems

In grasshoppers, the body color of brown is dominant over green. Also, having
strong legs is dominant over having weak legs. A heterozygous brown, homozygous
strong-legged male meets a heterozygous brown, homozygous weak legged female.
They produce a number of offspring. Complete the following.

a. Possible genotypes for Brown body color: ________ Green body color: _______
b. Possible genotypes for Strong legs: _________ Weak legs: _________
c. Male genotype: _____________ Male possible gametes: _______________
d. Female genotype: ___________ Female possible gametes: ______________

e.Draw Punnet Square

f. Genotypic Ratio:
g. Phenotypic Ratio:
h. What percentage of the offspring will exhibit both dominant traits? _______
i. What percentage of the offspring will have a brown body and weak legs? ______
j. What are the chances of having a green grasshopper with strong legs? __ in __

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