Distinguish between monozygotic (MZ) twins and dizygotic (DZ) twins.
What will be an ideal response?
Answers will vary. Now and then, a zygote divides into two cells that separate so that each develops into an individual with the same genetic makeup. These individuals are identical twins, or monozygotic (MZ) twins. If the woman produces two ova in the same month and they are each fertilized by different sperm cells, they develop into fraternal twins, or dizygotic (DZ) twins. DZ twins run in families. If a woman is a twin, if her mother was a twin, or if she has previously borne twins, the chances rise that she will bear twins.
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Physical activity contributes in a fundamental way to
a. a toddler's selfÂconcept. b. a parent's mental health. c. gender role development. d. a father's involvement with a toddler.
According to the James-Lange theory, we experience emotion ____
a. first, then come our actions b. and act upon that emotion, simultaneously c. after we experience autonomic arousal d. and must label it before we can act on it