Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 25, Problem 6PDQ
An inbred strain of plants has a mean height of 24 cm. A second strain of the same species from a different geographic region also has a mean height of 24 cm. When plants from the two strains are crossed together, the F1 plants are the same height as the parent plants. However, the F2 generation shows a wide range of heights; the majority are like the P1 and F1 plants, but approximately 4 of 1000 are only 12 cm high and about 4 of 1000 are 36 cm high.
- (a) What mode of inheritance is occurring here?
- (b) How many gene pairs are involved?
- (c) How much does each gene contribute to plant height?
- (d) Indicate one possible set of genotypes for the original P1 parents and the F1 plants that could account for these results.
- (e) Indicate three possible genotypes that could account for F2 plants that are 18 cm high and three that account for F2 plants that are 33 cm high.
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A strain of plants has a mean height of 24 cmcm. A second strain of the same species from a different geographical region also has a mean height of 24 cmcm.
When plants from the two strains are crossed together, the F1F1 plants are the same height as the parent plants.
However, the F2F2 generation shows a wide range of heights; the majority are like the P1P1 and F1F1 plants, but approximately 4 of 1000 are only 12 cmcm high, and about 4 of 1000 are 36 cmcm high.
A strain of plants has a mean height of 24 cmcm. A second strain of the same species from a different geographical region also has a mean height of 24 cmcm.
When plants from the two strains are crossed together, the F1F1 plants are the same height as the parent plants.
However, the F2F2 generation shows a wide range of heights; the majority are like the P1P1 and F1F1 plants, but approximately 4 of 1000 are only 12 cmcm high, and about 4 of 1000 are 36 cmcm high.
How many gene pairs are involved?
Express your answer as an integer.
A strain of plants has a mean height of 24 cmcm. A second strain of the same species from a different geographical region also has a mean height of 24 cmcm.
When plants from the two strains are crossed together, the F1F1 plants are the same height as the parent plants.
However, the F2F2 generation shows a wide range of heights; the majority are like the P1P1 and F1F1 plants, but approximately 4 of 1000 are only 12 cmcm high, and about 4 of 1000 are 36 cmcm high
How much does each gene contribute to plant height?
Express your answer as an integer.
Chapter 25 Solutions
Concepts of Genetics (12th Edition)
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