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In the summer squash, the allele for white fruit (F) is dominant over the allele for yellow fruit (f). Likewise, the allele for disc-shaped (D) fruit is dominant over the allele for sphere-shaped (d) fruit. Please note that the gene for fruit color is on chromosome 2 and the gene for fruit shape is on chromosome 11.

Parents: FdDd x FdDd

Select the gamete combination(s) donated by the parent 2.

a. FF
b. FD
c. Dd
d. Fd
e. Ft
f. fd
g. fD
h. dd
i. FfDd

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Answer:

b. FD

d. Fd

c. Dd

h. dd

Explanation:

From the given information:

We are given a dihybrid cross that comprises two traits. The crossing exists between two heterozygous white disc-shaped traits i.e. FdDd.

If the parent self crossed, the gamete combinations for the F1 generation are:

        F      d

D     FD   Dd

d     Fd     dd

Therefore, the gametes combinations are four potential and feasible combinations of FdDd that can enter into the Filial generation crossing.

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