In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this example, smooth peas are the unknown and wrinkled peas are the known (rr). If half of the offspring from that cross are smooth and half are wrinkled, what is the genotype of the unknown plant? O a. Homozygous dominant: RR O b. Homozygous recessive: rr O c. Incomplete dominance d. Heterozygous dominant: Rr

In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this example, smooth peas are the unknown and wrinkled peas are the known (rr). If half of the offspring from that cross are smooth and half are wrinkled, what is the genotype of the unknown plant? O a. Homozygous dominant: RR O b. Homozygous recessive: rr O c. Incomplete dominance d. Heterozygous dominant: Rr

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Description: In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this example, smoothpeas are the unknown and wrinkled peas are the known (rr). If half of the offspring from that cross are smooth andhalf are wrinkled, what

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 2ACQ: Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are...

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Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?
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.a. Give the genotypes and phenotypes of the parents, the F1, and the F2.b. Give the genotypes and phenotypes of the offspring of a backcrossbetween the F1 and the orange-fruited parent.c. Give the genotypes and phenotypes of a backcross between the F1 and the cream-fruited parent
In four o’clock, Mirabilis jalapa, it was found out that the allele W for red flowers is incompletely dominant over that for white, the heterozygous being pink. What are the phenotypes if a cross between these parents will yield:a. 27 red, 48 pink, 24 white flowered plants________ x_______ b. 18 red and 15 pink flowered plants ________ x________ c. 32 pink and 29 white flowered plants ________ x_______
In a particular plant, two genes control leaf shape and color. Round leaves (R) are dominant to jagged leaves (r). Yellow fruits (Y) are dominant to white fruits (y). If you crossed a homozygous round, heterozygous yellow plant with a heterozygous round, white plant, what are the genotypes of the plants involved in this cross? Answer RRYY X rryy?
Which of the following is an example of a reciprocal cross? A. An F1 offspring is crossed back to one of its parents. B. Two randomly chosen F2 individuals are crossed C. A mother's phenotype in an initial cross is the father's phenotype in a subsequent cross and father's phenotype in the first cross is the mother's phenotype in the subsequent cross. D. An individual with unknown genotype is crossed to a homozygous recessive individual. E. Pollen from the male reproductive structure of one individual is used to fertilize an egg from the female reproductive structure of the same individual.
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In a test cross, peas of an unknown genotype are crossed with peas of a known genotype. In this example, smooth peas are the unknown and wrinkled peas are the known (rr). If half of the offspring from that cross are smooth and half are wrinkled, what is the genotype of the unknown plant?
A particular flower can be purple, blue, red or white. Two different pure-breeding white plants are crossed and the F1 are then crossed to produce an F2 generation. What might a 9:7 phenotypic ratio in the F2 indicate? A) additivity B) codominance C) recessive lethality D) reciprocal recessive epistasis E) dominant epistasis Explain each answer.
Suppose we have a pea plant that’s homozygous for round seeds (dominant) and we cross it with a plant that’s homozygous for wrinkled seeds. What genotype would the F1 generation have? Group of answer choices A. round seeds B. wrinkled seeds C. RR D. Rr E. rr
A cross is made between a green four-o’clock plant and a variegated one. If the variegated plant provides the pollen, the expected outcome of the phenotypes of the offspring will bea. all plants with green leaves.b. 3 plants with green leaves to 1 plant with variegated leaves. c. 3 plants with green leaves to 1 plant with white leaves.d. some plants with green leaves, some with variegatedleaves, and some with white leaves
In peas, tall is dominant over dwarf. If a plant homozygous for tall is crossed with one homozygous for dwarf : a. What will be the genotype(s) (use the initial of your last name) and phenotype (s) of the F1 plants? b. If the F1 is grown the next season, predict the possible genotypes and phenotypes. c. If you cross the F1 to the tall parent, what phenotype will result of the cross? What will be the ratio of the genotype? d. If you cross the F1 to the short parent, what phenotype will result of the cross? What will be the ratio of the genotype?