Drosophila buzzatii is a fruit fly that feeds on rotting fruits of cacti in Australia. The broad-sense heritability of body size (thorax length) was calculated from a natural population (raised in the wild) and from a D. buzzatii population collected from the same wild population but raised in the laboratory. They found an H2 in the wild population of 0.09, and an H2 in the lab-reared population of 0.40. Assume that the genetic variance is the same across populations. Which of the following is a valid possible reason for this difference? A. The phenotypic variance is larger for the wild population than for the lab population, due to greater environmental variation in the wild. B. The phenotypic variance is smaller for the wild population than for the lab population, due to less environmental variation in the wild. C. The question can not be answered without more information D. Both A and B
Drosophila buzzatii is a fruit fly that feeds on rotting fruits of cacti in Australia. The broad-sense heritability of body size (thorax length) was calculated from a natural population (raised in the wild) and from a D. buzzatii population collected from the same wild population but raised in the laboratory. They found an H2 in the wild population of 0.09, and an H2 in the lab-reared population of 0.40. Assume that the genetic variance is the same across populations. Which of the following is a valid possible reason for this difference? A. The phenotypic variance is larger for the wild population than for the lab population, due to greater environmental variation in the wild. B. The phenotypic variance is smaller for the wild population than for the lab population, due to less environmental variation in the wild. C. The question can not be answered without more information D. Both A and B
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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Drosophila buzzatii is a fruit fly that feeds on rotting fruits of cacti in Australia. The broad-sense heritability of body size (thorax length) was calculated from a natural population (raised in the wild) and from a D. buzzatii population collected from the same wild population but raised in the laboratory. They found an H2 in the wild population of 0.09, and an H2 in the lab-reared population of 0.40. Assume that the genetic variance is the same across populations. Which of the following is a valid possible reason for this difference?
| A. |
The |
|
| B. |
The phenotypic variance is smaller for the wild population than for the lab population, due to less environmental variation in the wild. |
|
| C. |
The question can not be answered without more information |
|
| D. |
Both A and B |
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