Jane is a 20-year-old individual who externally resembles a female but who is actually genetically a male (XY). Based on your knowledge of human development, how could this be possible?
A) Although Jane is genetically a male, she has produced an abnormal amount of estrogen since birth.
B) During development, Jane's body produced an excessive amount of testosterone, leading to the development of female external genitalia.
C) Jane's embryonic gonads did not produce androgens, or they lacked functional testosterone receptors.
D) Due to a genetic defect, Jane lacks sufficient aromatase activity, the enzyme that converts testosterone into estrogen.
C
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Match the following items with the correct phrases.
_______1. Several dozen people having nausea and diarrhea several hours after a church picnic. _______2. A disease that occurs only every once in a while in a particular geographic region. _______3. A disease that is always present in a particular geographical region. a. endemic disease b. epidemic disease c. pandemic disease d. sporadic disease
What happens to a cell that is placed in an isotonic solution?
a. The cell swells. b. The cell shrinks. c. The cell stays the same size. d. The cell crenate.
Chromosomes of a pair of homologous chromosomes may differ from other chromosomes in terms of
a. size. b. shape. c. alleles they carry. d. position of the centromere. e. all of these.
Which of the following areas of the respiratory tract is lined with a single layer of epithelial cells?
a. nasal cavity b. larynx c. trachea d. bronchi e. alveoli