QUESTION 31 You are examining a population that has recently been subject to artificial selection for larger filet size (body size) through selective breeding in a commercial fishery. The artificial selection took quite a few generations, but the researchers were eventually successful. Which of the following statements is most likely true? a. There is likely no correlation between parent and offspring filet size (body size). b. The population experiencing artificial selection always has higher fitness than wild populations. c. The offspring of the selected population will, on average, be larger than the wild populations. d. The filet size (body size) of the fish is most likely controlled by a single gene.
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
QUESTION 31
-
You are examining a population that has recently been subject to artificial selection for larger filet size (body size) through selective breeding in a commercial fishery. The artificial selection took quite a few generations, but the researchers were eventually successful. Which of the following statements is most likely true?
a. There is likely no correlation between parent and offspring filet size (body size).
b. The population experiencing artificial selection always has higher fitness than wild populations.
c. The offspring of the selected population will, on average, be larger than the wild populations.
d. The filet size (body size) of the fish is most likely controlled by a single gene.
Step by step
Solved in 2 steps
