3. If the heritability of a trait in a population is low (a) few individuals hav

Question

3. If the heritability of a trait in a population is low (a) few individuals have the trait (b) most of the phenotypic variation for the trait in the population is due to environmental differences experienced by individuals (c) most of the phenotypic variation for the trait in the population is due to genetic differences among individuals (d) there are no genes that code for the trait (e) b and d are correct 4. The selection differential for a quantitative trait is heritability is the same in all cases, a larger selection differential Assuming (a) the amount that the mean of the trait changes in the next generation; means there was more change in the trait between generations (b) the difference between the mean for the trait in the original population and the mean of those individuals that reproduced; means there will be more change in the trait in the next generation. (c) the difference between the mean for the trait in the original population and the mean of those individuals that reproduced; means there will be less change in the trait in the next generation (d) the amount that the mean of the trait changes in the next generation; means there was less change in the trait between generations 5. The greyhound is a dog breed known for its amazing speed. This breed was produced by taking the fastest animals and breeding them together generation after generation. Though artificial, this is an example of (a) stabilizing selection (b) disruptive selection (c) overdominance (d) directional selection (e) underdominance

Explanation / Answer

Ans 3 : b)Most of the phenotypic variation for the trait in the population is due to the environmental differences experienced by the individuals

The phenotypic variations in the population can be due to the genetic and environmental differences. When the heritability is high (closer to 1) , the phenotypic variations are due to genetic differences , and when it is low , then the environmental differences play the major contributory role.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.