There are two main types of chromosomal disorders, those that take place on the 21st pair of chromosomes and those ______

a. that take place on the 20th pair
b. that take place on the 22nd pair
c. that involve the sex chromosomes
d. that involve rapidly developing chromosomes

Answer: C

Psychology

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A cessation of menstruation in women usually occurs between ages 45 and 55. This is called __________

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