XO
a. turner syndrome
b. jacob syndrome
c. Poly-X
d. Klinefelter Syndrome
Answer: a. turner syndrome
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A population of mountain goats are split because of the formation of a glacier. After 500 years the glacier melts and the two goat populations are free to move between the two areas. Under what conditions might a hybrid zone occur?
A. Both pre-¬ and post-¬zygotic isolating mechanisms have arisen. B. Reproductive isolation is incomplete. C. Pre-¬zygotic isolating mechanisms have arisen. D. Post-¬zygotic isolating mechanisms have arisen. E. Gene flow between the two populations does not occur.
Most organisms are dependent upon plants
because
a. plants produce oxygen as a by-product of photosynthesis. b. as producers, they form the base of food chains. c. they function to prevent erosion and reduce desertification. d. as they remove carbon dioxide from the atmosphere, they reduce the problems generated by the greenhouse effect. e. all of these apply
What would be the karyotypic designation of a female with trisomy for the X chromosome?
____________________ Fill in the blank(s) with the appropriate word(s).
Standing out in center field, the baseball player watches the hitter's bat strike the ball and then, slightly later, hears the sound of the impact. What types of sensory receptors did the player just use?
A) thermoreceptors and chemoreceptors B) photoreceptors and mechanoreceptors C) chemoreceptors and pain receptors D) pain receptors and thermoreceptors