Mouse pigmentation is subject to epistasis of the B alleles by the d alleles. B (black) is dominant over b (brown), and
D is dominant over d. Homozygous d is epistatic to the black and brown genes. Given this information, what will result
from a F1 cross between two mice?
a. 9/16 black, 3/16 brown, 4/16 white
b. 9/16 white, 3/16 brown, 4/16 black
c. 9/16 black, 6/16 brown, 1/16 white
d. 9/16 white, 6/16 brown, 1/16 black
e. All black mice
ANSWER: a
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Four of the five answers listed below are events associated with the aging process. Select the
exception. a. skin wrinkling b. increased metabolism c. decreased muscle mass d. altered collagen e. increased fat deposition
The hormones secreted from the adrenal cortex, like cortisol, which raise the blood glucose level are collectively called _______
A. Mineralocorticoids
B. Gonadocorticoids
C. Corticosteroids
D. Glucocorticoids
Which value(s) would be required to calculate how long ago the most recent ancestor of ungulates lived?
I) the number of base pairs that differ among species in a certain genetic sequence II) the total number of base pairs in the genetic sequence examined III) the age of a fossil ancestor for calibration A) I B) II C) III D) I, II, and III
A rule, natural law, or truth used as a standard to guide conduct is known as a:
A) criterion. B) code. C) principle. D) benchmark.