A heterozygous fruit fly with normal wings and a gray body (VvBb) is crossed with homozygous flies with vestigial
wings and black bodies (vvbb). If there are 800 F1 progeny, the expected phenotypes would be:
a. 200 normal gray, 200 normal black, 200 vestigial gray, and 200 vestigial black
b. 400 normal gray and 400 vestigial black
c. 800 normal gray
d. 800 vestigial black
e. 450 normal gray, 150 normal black, 150 vestigial gray, and 50 vestigial black
a
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Sensory adaptation
a. increases one's sensitivity to changes in environmental stimuli. b. increases one's sensitivity to constant stimuli. c. is primarily associated with pain receptors. d. functions the same way in all types of sensory receptors. e. is unique to predator animals.
In a competitive interaction in which species 1 has a higher carrying capacity (K1 ) than species 2 (K2 ), it is expected that species ________ will go extinct
Fill in the blank(s) with correct word
Each codon consists of how many bases?
a. 3 b. 9 c. 16 d. 64 e. 128
Which is a symptom of a transmissible spongiform encephalopathy (TSE)?
a. influenza-like symptoms b. progressive immune deficiency c. degeneration of the digestive tract d. inflammation of the reproductive organs e. degeneration of the brain and central nervous system