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A Child's World: Infancy through Adolescence, 9/e

Diane E. Papalia, University of Wisconsin-Madison
Sally Wendkos Olds
Ruth Duskin Feldman

Forming a New Life

True/False


1	In preindustrial societies, large families were rare.
		A)	True
		B)	False


2	The ovum is the largest cell in the adult human body.
		A)	True
		B)	False


3	A sperm may locate a fertile ovum by its scent.
		A)	True
		B)	False


4	Twins are always of the same sex.
		A)	True
		B)	False


5	About 20 percent of infertile couples eventually conceive
		A)	True
		B)	False


6	Ovum transfer can help a postmenopausal woman bear a child.
		A)	True
		B)	False


7	Every cell in the human body has 46 chromosomes (23 pairs).
		A)	True
		B)	False


8	Mitosis is a process of cell division normally resulting in exact duplicates of the original cell.
		A)	True
		B)	False


9	The father's sperm normally determines a child's sex.
		A)	True
		B)	False


10	Twenty-two of the twenty-three pairs of chromosomes are autosomes.
		A)	True
		B)	False


11	Most normal human traits can be explained by Mendel's law of dominant inheritance.
		A)	True
		B)	False


12	Skin color is an example of polygenic inheritance.
		A)	True
		B)	False


13	Multifactorial transmission is the result of the interaction of several different genes.
		A)	True
		B)	False


14	Normal genes are usually dominant over abnormal ones.
		A)	True
		B)	False


15	If a couple's first child has a recessive defect, the second child will also have it.
		A)	True
		B)	False


16	Red-green color blindness is a sex-linked trait.
		A)	True
		B)	False


17	Dennis has hemophilia. His son, Ira, has a 50 percent chance of inheriting the abnormal gene and being a carrier of the disorder.
		A)	True
		B)	False


18	The risk of Down syndrome rises with the age of either parent.
		A)	True
		B)	False


19	Family (kinship) studies provide a good way to distinguish hereditary from environmental influences.
		A)	True
		B)	False


20	If dizygotic twins are highly concordant for a trait, the trait is likely to be strongly influenced by heredity.
		A)	True
		B)	False


21	Stunted growth due to malnutrition is an example of reaction range.
		A)	True
		B)	False


22	Maturation is programmed by the genes and cannot be affected by environmental factors.
		A)	True
		B)	False


23	Differences in personalities of siblings who grow up in the same household are due to genetic differences.
		A)	True
		B)	False


24	Temperament is mostly the result of parental responsiveness during early infancy.
		A)	True
		B)	False


25	Schizophrenia appears to be transmitted multifactorially.
		A)	True
		B)	False

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