Normal human cells have

a. twenty-two chromosome pairs and one pair of sex chromosomes.
b. twenty-one trisomy chromosome pairs, one autosomal pair and one pair of sex chromosomes.
c. twenty-one chromosome pairs and two trisomy chromosome pairs.
d. twenty-three chromosome pairs.

a. twenty-two chromosome pairs and one pair of sex chromosomes.

Psychology

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In explaining adult development, psychologists must ______

a. explain both changes with age and continuities b. focus primarily on explaining changes with age c. focus primarily on explaining continuities with age d. deal most centrally with individual differences in responses to life problems

Psychology

_______________ results from a missing enzyme that results in certain waste products not being destroyed by lysosomes. As a result, lysosomes get larger, eventually causing the brain to swell

a. Pyridoxine dependency b. Galactosemia c. Phenylketonuria d. Tay-Sachs disease

Psychology