When Mendel crossed true-breeding pea plants with purple and white flowers, why did all of the F1 offspring always look like one of the two parental varieties? One allele was dominant. The traits blended together during fertilization. Each allele affected phenotypic expression. No genes interacted to produce the parental phenotyne

When Mendel crossed true-breeding pea plants with purple and white flowers, why did all of the F1 offspring always look like one of the two parental varieties? One allele was dominant. The traits blended together during fertilization. Each allele affected phenotypic expression. No genes interacted to produce the parental phenotyne

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Description: 6 When Mendel crossed true-breeding pea plants with purple and white flowers, whydid all of the F1 offspring always look like one of the two parental varieties?One allele was dominant.The traits blended together during fertilization.Each allele affec

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter3: Transmission Of Genes From Generation To Generation

Section: Chapter Questions

Problem 30QP: Variations on a Theme by Mendel Pea plants usually have white or red flowers. A strange pea-plant...

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Variations on a Theme by Mendel Pea plants usually have white or red flowers. A strange pea-plant variant is found that has pink flowers. A selfcross of this plant yields the following phenotypes: 30 red flowers 62 pink flowers 33 white flowers What are the genotypes of the parents? What is the genotype of the progeny with red flowers?
Variations on a Theme by Mendel A characteristic of snapdragons amenable to genetic analysis is flower color. Imagine that a true-breeding red- flowered variety is crossed to a pure line having white flowers. The progeny are exclusively pink-flowered. Diagram this cross, including genotypes for all P1 and F1 phenotypes. What is the mode of inheritance? Let F = red and f = white.
More Crosses with Pea Plants: The Principle of Independent Assortment Consider the following cross in pea plants, in which smooth pea shape is dominant to wrinkled, and yellow pea color is dominant to green. A plant with smooth yellow peas is crossed to a plant with wrinkled green peas. The offspring produced peas that were all smooth and yellow. What are the genotypes of the parents? What are the genotypes of the offspring?
More Crosses with Pea Plants: The Principle of Independent Assortment Determine the possible genotypes of the following parents by analyzing the phenotypes of their children. In this case, we will assume that brown eyes (B) is dominant to blue (b) and that right-handedness (R) is dominant to left-handedness (r). a. Parents: brown eyes, right-handed brown eyes, right-handed Offspring: 3/4 brown eyes, right-handed 1/4 blue eyes, right-handed b. Parents: brown eyes, right-handed blue eyes, right-handed Offspring: 6/16 blue eyes, right-handed 2/16 blue eyes, left-handed 6/16 brown eyes, right-handed 2/16 brown eyes, left-handed c. Parents: brown eyes, right-handed blue eyes, left-handed Offspring: 1/4 brown eyes, right-handed 1/4 brown eyes, left-handed 1/4 blue eyes, right-handed 1/4 blue eyes, left-handed
More Crosses with Pea Plants: The Principle of Independent Assortment Consider the following cross: P1: AABBCCDDEE aabbccddee F1: AaBbCcDdEe (self-cross to get F2) What is the chance of getting an AaBBccDdee individual in the F2 generation?
Flower color in snapdragons is an incompletely dominant trait; progeny of crosses between true- breeding red- and white-flowered plants have pink flowers. A cross between two snapdragon plants yielded progeny with all 3 flower colors. What can be inferred about the phenotypes of the parents? O We cannot infer the phenotypes of the parents Both parents had red flowers O One parent had red flowers and the other had white flowers O Both parents had pink flowers O Both parents had white flowers
Mendel crossed a plant with yellow seeds (YY) with a plant with green seeds (yy). The F2 generation yielded 12 200 yellow-seeded plants and 4150 green-seeded plants. From this experiment Mendel proposed the Law of O Segregation O Mutation O Independent assortment O Codominance
O Hydrolyze lactose into glucose and galactose for cellular metabolism A red-flower plant crossed with a white-flower plant of the same species, produced F1 with all pink flowers. Self-pollination of the F1 plant produced F2 generation with 39 red-flower plants, 83 pink-flower plants and 40 white-flower plants. What does this experiment demonstrate? * Codominanoce O Incomplete dominance O Polygenic inheritance Multiple alleles In organism A, blue skin colour is dominant over yellow. If, heterozygous blue skin
Two true-breeding white strains of the plantIllegitimati noncarborundum were mated, and theF1 progeny were all white. When the F1 plants wereallowed to self-fertilize, 126 white-flowered and33 purple-flowered F2 plants grew.a. How would you describe inheritance of flowercolor? Describe how specific alleles influence eachother and therefore affect phenotype.b. A white F2 plant is allowed to self-fertilize. Ofthe progeny, 3/4 are white-flowered, and 1/4 are purple-flowered. What is the genotype of the whiteF2 plant?c. A purple F2 plant is allowed to self-fertilize. Of theprogeny, 3/4 are purple-flowered, and 1/4 arewhite-flowered. What is the genotype of the purpleF2 plant?d. Two white F2 plants are crossed with each other.Of the progeny, 1/2 are purple-flowered, and 1/2are white-flowered. What are the genotypes of thetwo white F2 plants?
Aboten te breed a pea plant that displays a very specific phenotype, they would like a pea plant with green seeds in a yellow pod Using their knowledge of the pea plants they are working with they have del hich trat e dominant and which are recessive, as well as, what alieles are present in the parent plants. Pea Plant Traits Flower Flower Seed Color Po S Pod Color Plant Sire Color Location Axial YG Yg yG yg Infiated Green Purple Tall yG R Y. G. T. yg Terminal Short (Dwarf) Weinkled Green Constricted Yellow White yG yg y t Previous
Mendel crossed peas having round green seeds with peas havingwrinkled yellow seeds. All F1 plants had seeds that were roundand yellow.
A rooster with a particular comb morphology calledwalnut was crossed to a hen with a type of comb morphology known as single. The F1 progeny all had walnut combs. When F1 males and females were crossedto each other, 93 walnut and 11 single combs wereseen among the F2 progeny, but there were also29 birds with a new kind of comb called rose and32 birds with another new comb type called pea.a. Explain how comb morphology is inherited.b. What progeny would result from crossing a homozygous rose-combed hen with a homozygouspea-combed rooster? What phenotypes and ratioswould be seen in the F2 progeny?c. A particular walnut rooster was crossed to a peahen, and the progeny consisted of 12 walnut,11 pea, 3 rose, and 4 single chickens. What are thelikely genotypes of the parents?d. A different walnut rooster was crossed to a rosehen, and all the progeny were walnut. What are thepossible genotypes of the parents?