If Fraternal Twins Are More Likely to Be Concordant for a Trait

question 68

Multiple Choice

If fraternal twins are more likely to be concordant for a trait than other siblings, can it be concluded that the higher concordance rate is due to the greater degree of genetic relatedness?

• A) Yes.
• B) Yes, but only if the siblings studied are of the same sex and age.
• C) No, because fraternal twins are no more genetically alike than other siblings.
• D) No, because the greater similarity can be attributed to environmental influence.

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Definitions:

F Ratio

A statistical measure used in ANOVA tests to assess the variability among group means compared to within-group variability.

Null Hypothesis

The default position that there is no difference or effect in a population, used as a starting point for statistical testing.

F-ratio

A statistical value used in ANOVA tests to determine the ratio of variance between groups to variance within groups.

Null Hypothesis

A statement that asserts there is no significant difference or effect, which researchers aim to test against alternative hypotheses.