Yellow guinea pigs crossed with white ones always produce cream-colored offspring. Two cream guinea pigs, when crossed, produce yellow, cream, and white offspring in the ratio of 1 yellow : 2 cream : 1 white. What principle of genetics is involved in this cross?
Yellow guinea pigs crossed with white ones always produce cream-colored offspring. Two cream guinea pigs, when crossed, produce yellow, cream, and white offspring in the ratio of 1 yellow : 2 cream : 1 white. What principle of genetics is involved in this cross?
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter12: Mendel, Genes, And Inheritance
Section: Chapter Questions
Problem 6TYK
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Yellow guinea pigs crossed with white ones always produce cream-colored offspring. Two cream guinea pigs, when crossed, produce yellow, cream, and white offspring in the ratio of 1 yellow : 2 cream : 1 white. What principle of genetics is involved in this cross? (1 point)
2. The shape of radishes may be long, round, or oval. The following results were obtained in the different possible crosses:
a. long x oval gave ½ long and ½ oval
b. oval x round gave ½ oval and ½ round
c. long x round gave all oval
d. oval x oval gave ¼ long, ½ oval, and ¼ round
Explain these results. Hint: Show genotypes of each cross) (2 points).
a.
b.
c.
d.
3. In human blood types, what are the genotypes of the following parents? (2 points).
Phenotypes of ParentsPhenotypes of OffspringGenotypes of parents
ABABO
A x AB½ 0½ 0_______ x _______
A x AB½ ¼¼0_______ x _______
A x A¾00¼_______ x _______
A x O½00½_______ x _______
A x B¼¼¼¼_______ x _______
Expert Solution
Step 1
Given that Yellow guinea pig was crossed with white one. Thus cross will always produce cream colored offspring.
*And also given that when two cream guinea pigs were crossed they produce yellow and cream and white offspring in the ratio of 1 yellow : 2 cream : 1 white.
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