You are examining population genetics of aquatic iguanas that live on the Galapagos islands. When you go to visit, you notice that the iguanas can easily swim to close neighboring islands but would have swim very long distances to reach further islands. Which of the following statements is a likely conclusion from your research? a. Populations are less similar the closer the islands are to each other. b. The further the islands likely have the greatest genetic diversity. c. Larger islands always have the lowest heterozygosity. d. Smaller populations on very small islands exhibit greater population differentiation.
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.
You are examining population genetics of aquatic iguanas that live on the Galapagos islands. When you go to visit, you notice that the iguanas can easily swim to close neighboring islands but would have swim very long distances to reach further islands. Which of the following statements is a likely conclusion from your research?
| a. |
Populations are less similar the closer the islands are to each other. |
|
| b. |
The further the islands likely have the greatest genetic diversity. |
|
| c. |
Larger islands always have the lowest heterozygosity. |
|
| d. |
Smaller populations on very small islands exhibit greater population differentiation. |
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