Klinefelter syndrome is a genetic disorder in which males have an extra X chromosome
These individuals have some breast development, small testes, and sparse facial and body
hair. This syndrome is likely a result of _______________.
a. nondisjunction
b. incomplete crossing over
c. problems with DNA replication
d. lack of spermatogenesis
A
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Which of the following represents the expected genotypes of an F2 generation consisting of 8 individuals from an initial cross of a true-breeding black BB. rabbit and a true-breeding white bb. rabbit?
A. 8 progeny: 8 BB, 0 bb, 0 Bb B. 8 progeny: 4 BB, 4 bb, 0 Bb C. 8 progeny: 2 BB, 2 bb, 4 Bb D. 8 progeny: 0 BB, 0 bb, 8 Bb
Which of the following best describes the degrees of freedom for the calculation of variance?
A. (n + 1) B. 2(n + 1) C. (n - 1)/n D. (n - 1)
In sexual reproduction, two __________ fuse to form a __________
a. gametes; zygote b. eggs; embryo c. sperm; zygote d. gonads; embryo
Which cells assist and nourish neurons that transmit electrical signals?
a. receptor cells b. neurons c. effector cells d. glial cells e. signal cells