Explain how DZ and MZ twins are formed. Include a discussion of ethnic variations and factors that increase the chances of having twins
What will be an ideal response?
Answer: DZ twins result when the female releases two eggs instead of one and each is fertilized with a sperm. MZ twins result when a zygote is formed and it divides. DZ twins are more common among Africans and least common among Asians. MZ twins are not more common in some ethnic groups. The chances of having DZ twins increase if they run in the family, if the person is in good health and if the mother is older. None of these variables predicts MZ twins.
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What was Mary Ainsworth trying to determine when she devised an experimental method called the Strange Situation?
a. the nature of gestural communication between mothers and babies b. aspects of purposeful exploration as the baby investigates a strange environment c. parental discipline styles in the first year of life d. the nature of attachment between caretakers and babies e. the relationship between preschool enrollment and academic achievement
Joella was rollerblading when a cat jumped right in front of her causing her to trip and fall. When she fell, she partially landed on the front side of her head near her forehead
Shortly afterwards, Joella exhibited symptoms similar to that of Phineas Gage. Which lobe would have been most affected by this fall? a. frontal b. temporal c. parietal d. occipital e. inguinal