A Study of 500 Pairs of MZ and DZ Twins

question 21

Multiple Choice

A study of 500 pairs of MZ and DZ twins done in Kentucky found that in terms of intelligence,

• A)the correlations between MZ twins and DZ twins were different.
• B)the correlations between DZ twins were about the same as those between other siblings.
• C)MZ twins were generally smarter than DZ twins.
• D)DZ twins were generally smarter than MZ twins.

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Definitions:

Colposcope

A medical diagnostic device used to closely examine the cervix and vagina for signs of disease.

Cervix

The narrow passage forming the lower end of the uterus, connecting it with the vagina.

CEA

An abbreviation for Carcinoembryonic Antigen, a protein normally present at very low levels in the blood but which can be elevated in certain types of cancer.

NHL

Stands for Non-Hodgkin Lymphoma, a type of cancer that affects the lymphatic system.