You are given two true-breeding groups of gerbils. The gerbils in the first group have black coat color and curly tails; the gerbils in the second group have yellow coat color and straight tails
When you produce an F1 generation, you see only gerbils with black coat color and
curly tails. When you produce an F2 generation, you see some gerbils with black coat color
(75%) and some gerbils with yellow coat color (25%). You also see some of the gerbils have
straight tails (25%) and others (75%) have curly tails. If the single alleles responsible for coat
color and tail appearance sort independently, how many of the black gerbils are expected to
have straight tails?
A. 100%
B. 75%
C. 25%
D. 0%
C
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The cessation of smoking may do all of the following EXCEPT
a. can reduce the risk of stillbirth. b. reduces the chances of cancer. c. reduces the chances of coronary disease. d. improves lung functioning. e. increase chances of sleep apnea.
One finding of the Human Genome Project was that mutations in _____ can cause mutations in distant regions of the
genome, which can result in cancer. a. DNA repair genes b. promoter regions c. introns d. SNPs e. open reading frames
The fibrous sac that encloses the heart is the ________.
A. myocardium B. epicardium C. ectocardium D. pericardium E. endocardium
During swallowing food, which structure moves downward to prevent food from entering the trachea?
a. larynx
b. pharynx
c. glottis
d. epiglottis
e. bronchus