Which of the following best describes a genetic male (XY) who lacks functional androgen receptors (androgen insensitivity syndrome)?
A. He will have ovaries and female-appearing external genitalia but male secondary sex characteristics.
B. He will have male external genitalia but will have female-appearing internal structures derived from the Müllerian ducts.
C. He will have female-appearing external genitalia and ovaries, but internal structures derived from the Wolffian ducts.
D. He will have normal male external genitalia.
E. He will have undescended testes, but female external genitalia and secondary sex characteristics.
Answer: E
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The division of each primary spermatocyte produces a pair of ________.
Fill in the blank(s) with the appropriate word(s).
A membranous region located between certain cranial bones in the skull of a vertebrate fetus or infant is called a __________
Fill in the blank(s) with the appropriate word(s)
The ________ is the dorsal diencephalon, containing the choroid plexus and the pineal gland.
A. third ventricle B. thalamus C. hypothalamus D. epithalamus
When epiblast cells travel through the primitive streak and underneath the epiblast layer, that movement is described as
A. invagination. B. chemotaxation. C. cleavage. D. capacitation.