No Two People Are Genetically Identical, Except for Identical Twins

question 16

Multiple Choice

No two people are genetically identical, except for identical twins. The main source of genetic variation among humans is ________.

• A) new mutations that occurred in the preceding generation
• B) genetic drift
• C) the reshuffling of alleles in sexual reproduction
• D) environmental effects

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Definitions:

Independent Variable

The variable in an experimental or observational study that is manipulated or categorized to observe its effect on the dependent variable.

Covariance Value

A measure indicating the extent to which two random variables change together, where a positive value implies direct correlation, and a negative value an inverse correlation.

Least Squares Regression

A statistical method used to determine the line of best fit by minimizing the sum of squares of the differences between observed values and the values predicted by the model.

Correlation Coefficient

A numerical measure that quantifies the degree of correlation or linear relationship between two variables, ranging from -1 to 1.