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Guide Questions 1. Examination of thousands of plants in a certain species revealed a range of pubescence from 60 hairs/em' to the glabrous (non-pubescent) condition. Assume that this variability is controlled by three gene pairs having a cumulative effect. Ignore the environment effect. When entirely pubescent (60 hairs/cm) were crossed to glabrous plants (0 hairs/em), all offsprings in the F1 exhibited an intermediate pubescent condition (30 hairs/cm). Several of the F, plants were selfed and the F2 plants were evaluated for pubescence. a. Assign genotypes to the original plants and the Fi plants. b. What proportion of the F2 progeny would be expected to be: i. ii. Completely pubescent (60 hairs/cm)? Intermediate pubescent (30 hairs/em)? With 40 hairs/cm? Homozygous for the genes involved? iv.

Guide Questions 1. Examination of thousands of plants in a certain species revealed a range of pubescence from 60 hairs/em' to the glabrous (non-pubescent) condition. Assume that this variability is controlled by three gene pairs having a cumulative effect. Ignore the environment effect. When entirely pubescent (60 hairs/cm) were crossed to glabrous plants (0 hairs/em), all offsprings in the F1 exhibited an intermediate pubescent condition (30 hairs/cm). Several of the F, plants were selfed and the F2 plants were evaluated for pubescence. a. Assign genotypes to the original plants and the Fi plants. b. What proportion of the F2 progeny would be expected to be: i. ii. Completely pubescent (60 hairs/cm)? Intermediate pubescent (30 hairs/em)? With 40 hairs/cm? Homozygous for the genes involved? iv.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Answer the remaining b i, ii, iii, iv

Guide Questions 1. Examination of thousands of plants in a certain species revealed a range of pubescence from 60 hairs/cm to the glabrous (non-pubescent) condition. Assume that this variability is controlled by three gene pairs having a cumulative effect. Ignore the environment effect. When entirely pubescent (60 hairs/cm) were crossed to glabrous plants (0 hairs/em), all offsprings in the F, exhibited an intermediate pubescent condition (30 hairs/cm). Several of the Fi plants were selfed and the F2 plants were evaluated for pubescence. a. Assign genotypes to the original plants and the Fi plants. b. What proportion of the F2 progeny would be expected to be: i. Completely pubescent (60 hairs/cm)? Intermediate pubescent (30 hairs/cm*)? With 40 hairs/cm?? Homozygous for the genes involved? ii. iv.
Transcribed Image Text:Guide Questions 1. Examination of thousands of plants in a certain species revealed a range of pubescence from 60 hairs/cm to the glabrous (non-pubescent) condition. Assume that this variability is controlled by three gene pairs having a cumulative effect. Ignore the environment effect. When entirely pubescent (60 hairs/cm) were crossed to glabrous plants (0 hairs/em), all offsprings in the F, exhibited an intermediate pubescent condition (30 hairs/cm). Several of the Fi plants were selfed and the F2 plants were evaluated for pubescence. a. Assign genotypes to the original plants and the Fi plants. b. What proportion of the F2 progeny would be expected to be: i. Completely pubescent (60 hairs/cm)? Intermediate pubescent (30 hairs/cm*)? With 40 hairs/cm?? Homozygous for the genes involved? ii. iv.
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