Homework SourseChapter313 13 Problem 15a In cucumbers orange fruit color R
Chapter3>13>
13.
(Problem 15a) In cucumbers, orange fruit color (R) is dominant over cream fruit color (r). A cucumber plant homozygous for orange fruit is crossed with a plant homozygous for cream fruit. The F1 are intercrossed to produce the F2. What are genotypes of the parents, the F1, and the F2?
| Chapter3>13> 13. | (Problem 15a) In cucumbers, orange fruit color (R) is dominant over cream fruit color (r). A cucumber plant homozygous for orange fruit is crossed with a plant homozygous for cream fruit. The F1 are intercrossed to produce the F2. What are genotypes of the parents, the F1, and the F2? | ||||||||||
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Solution
Chapter3>13>
13.
(Problem 15a) In cucumbers, orange fruit color (R) is dominant over cream fruit color (r). A cucumber plant homozygous for orange fruit is crossed with a plant homozygous for cream fruit. The F1 are intercrossed to produce the F2. What are genotypes of the parents, the F1, and the F2?
D. Parents (RR× rr); F1 (Rr); F2 (RR, Rr, and rr)
Explanation:
P1 = RR x rr
F1=Rr
F2 = Rr x Rr = RR, Rr, rr
14. (Problem 15b) In cucumbers, orange fruit color (R) is dominant over cream fruit color (r). A cucumber plant homozygous for orange fruit is crossed with a plant homozygous for cream fruit. Give the genotypes and phenotypes of the offspring of a backcross between the F1 and the orange parent.
D. Both A and B
Explanation:
P1 = RR x rr
F1=Rr
Rr x RR
= RR (orange), rR (orange)
15. (Problem 15c) In cucumbers, orange fruit color (R) is dominant over cream fruit color (r). A cucumber plant homozygous for orange fruit is crossed with a plant homozygous for cream fruit. Give the genotypes and phenotypes of a backcross between the F1 and the cream parent.
E. Both B and C
Explanation:
P1 = RR x rr
F1=Rr
Rr x rr
= Rr (orange), rr (Cream)
