You decide to analyze the inheritance of one more trait: the number of leaves per plant. You cross together two pure lines: one line with individuals growing one leaf per plant, and another line with five leaves per plant. All of the F1 progeny show five leaves per plant. You self-cross all of these F1 plants. The resulting F2 plants grow one, or five, leaves in the following numbers: 26 plants with one leaf & 77 plants with five leaves. Which one of the following options most accurately describes the likely genotype of the plants with one leaf? These plants are likely homozygous for the recessive allele for the leaf number gene. These plants are likely homozygous for the dominant allele for the leaf number gene. These plants are likely heterozygous for the leaf number gene. These plants are likely homozygous dominant or heterozygous for the leaf number gene. None of the above

You decide to analyze the inheritance of one more trait: the number of leaves per plant. You cross together two pure lines: one line with individuals growing one leaf per plant, and another line with five leaves per plant. All of the F1 progeny show five leaves per plant. You self-cross all of these F1 plants. The resulting F2 plants grow one, or five, leaves in the following numbers: 26 plants with one leaf & 77 plants with five leaves. Which one of the following options most accurately describes the likely genotype of the plants with one leaf? These plants are likely homozygous for the recessive allele for the leaf number gene. These plants are likely homozygous for the dominant allele for the leaf number gene. These plants are likely heterozygous for the leaf number gene. These plants are likely homozygous dominant or heterozygous for the leaf number gene. None of the above

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Description: You decide to analyze the inheritance of one more trait: the number of leaves per plant. You cross together two pure lines: one line with individuals growing one leaf per plant, and another line with five leaves per plant. All of the F1 progeny show

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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You decide to cross two true-breeding stocks of pea plants. One parent has blue, axial flowers and the other has white, terminal flowers; all F1 individuals have blue, axial flowers. If you then cross the F1, amongst the F2 offspring, what is the probability of plants with white axial flowers? (Note: The genes for flower colour and location assort independently) O 1/16 O9/16 O 3/16 1/8 O 1/4
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A plant geneticist is examining the mode of inheritance of flower color in two closely related species of exotic plants. The first species may have two pure-breeding lines—one produces a distinct red flower; and the other produces flowers with no color at all, or very pale yellow flowers. However, she cannot be sure. A cross of these varieties produces all pink-flowered progeny. The second species exhibits similar pure-breeding varieties; that is, one variety produces red flowers; and the other produces an albino or very pale yellow flower. A cross of these two varieties, however, produces orange-flowered progeny exclusively. Analyze the mode of inheritance of flower color in these two plant species.
In a dihybrid cross, a homozygous plant with purple and axial flowers (PPAA) is crossed with a homozygous plant with white and top flowers (ppaa). If the purple flower trait is dominant over white flowers and axial flowers are dominant over top flowers, what phenotypic ratio will be produced in the F1 generation? purple and axial flowers: white and top flowers – 3: 1 - purple and axial: Purple and top: white and axial: white top – 9: 3: 3: 1 all plants with purple and axial flowers – 4: 0 purple and axial flowers: white and top flowers – 1: 1 -
In Primula vulgaris (primrose), purple flowers are dominant to white flowers, and short plants are dominant to tall plants. The genes controlling these two traits are on different chromosomes. You cross a true-breeding purple, short plant with a true-breeding white, tall plant and then intercross the resulting F1 offspring. In the F2 offspring, you find the following phenotypes: Purple, short Purple, tall 608 161 White, short White, tall 173 58 With your knowledge of the x' test, you will determine whether the outcomes of the F1 intercross corresponds to expectations based on Mendelian genetics. 1. What is your null hypothesis for the outcome of the F1 intercross? Write it here: 2. Based on your null hypothesis, how many individuals do you expect in each of the phenotypic classes? Write your expectations below. Purple, short Purple, tall White, short White, tall 3. What are the degrees of freedom for this test? Write your answer here:
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A pea plant from a pure-breeding strain that is tall, has green pods, and has purple flowers that are terminal is crossed to a plant from a pure-breeding strain that is dwarf, has yellow pods, and has white flowers that are axial. The F1 plants are all tall and have purple axial flowers as well as green pods. What phenotypes do you expect to see in the F2? What phenotypes and ratios would you predict in the progeny from crossing an F1 plant to the dwarf parent?
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You have two true-breeding strains of coneflower. One strain has purple flowers and purple stems. The other strain has white flowers and green stems. When you cross these strains the F1 generation has purple flowers and purple stems. From this information you know that purple flowers is dominant to white flowers and that purple stems is dominant to green stems. In terms of genetic mechanisms, there could be two explanations: (1) flower color and stem color are each controlled by separate, independently segregating genes, and (2) there is one gene controlling both flower color and stem color. A. If explanation #1 is correct what would you see if the F1 generation were self-crossed to produce an F2 generation. Make up appropriate genetic symbols for this model and work out the cross to the F2 generation. B. If explanation #2 is correct what would you see if the F1 generation were self-crossed to produce an F2 generation. Make up appropriate genetic symbols for this model and work out the…
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