Genetic disorders like Down syndrome are caused by ________.

A. genes on the X-chromosome; females express this less often than males
B. a dominant allele, that if passed on by one or both parents, causes disease
C. errors in meiosis that cause a gamete to receive an extra chromosome
D. a recessive allele, that if passed on by both parents, causes disease


Answer: C

Anatomy & Physiology

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