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:

RFS

Requirement for the feature size; a specification in geometric tolerancing where size is a factor.

Runout Tolerance

A type of geometric tolerance that controls the variation of a feature's surface as it rotates about a datum axis.

Surface Profile

Describes the quantifiable variation, texture, or roughness of a surface over a specified area.

Thick Line

In drafting and drawing, a thick line typically refers to lines with increased weight used to denote boundaries, important features, or objects that are in the foreground.