Which of the following statements regarding DZ twinning is TRUE?
A) DZ twinning is determined by the mother's genetics and biology.
B) DZ twins occur more often among Asians than among Africans.
C) Higher rates of DZ twinning tend to run on the father's side of the family.
D) The incidence of DZ twinning is more frequent among younger mothers.
A
You might also like to view...
Costa and McCrae argue that personality traits undergo significant changes between early adulthood and old age
a. True b. False Indicate whether the statement is true or false
About _____ percent of adults over age 90 have lost all functional vision
a. 7 b. 17 c. 27 d. 37
In studying how animals adapt to their environment, ethologists focus on how animals use:
A. homeostasis B. fixed action patterns C. incentives D. social roles
If you are interested in how well students perform on a standardized math-achievement test after they have completed a six-week math unit in either a computer-assisted class, a videotaped course, or a regular classroom, what kind of design do you have?
a. A 2 × 2 between-subjects, factorial design b. A 3 × 2 between-subjects, factorial design c. A 3 × 3 between-subjects, incomplete factorial design d. A one-way design