A human female with only one X chromosome is said to have a condition called
A. Turner syndrome.
B. X chromosome inactivation.
C. Klinefelter syndrome.
D. Down syndrome.
E. Angelman syndrome.
Answer: A
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When Mendel crossed purple-flowered pea plants with white-flowered pea plants, he never got offspring with flowers that had an intermediate color. This was counter to the theory of
A. independent assortment. B. blending inheritance. C. direct transmission of traits. D. segregation of alleles. E. continuous variation of traits.
The 3 types of horizontal gene flow that occur in bacteria are __________, __________, and
__________. Fill in the blank(s) with the appropriate word(s).
Which of the following blocks HIV binding to host cell receptors?
A. Fuzeon B. Acyclovir C. Nevirapine D. Amantidine E. AZT
Suppose a founding population carries an allelic frequency not typical of the original population. Which of the following effects would most likely lead to homogenization?
A) genetic drift within the founding population B) random mating within the founding population C) no mutations within either population D) migration between the original and founding populations E) None of the above.