Coat color in mice involves the effects of multiple gene interactions. If a mouse has two recessive alleles (aa) for coat color, it will always be albino no matter what the genotype of other genes involved in coat color. This is an example of:
A: incomplete dominance.
B: heterosis.
C: codominance.
D: epistasis.
E: pleiotropy.
Answer: D: epistasis.
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What distribution pattern is the most common in the natural world?
a. random b. uniform c. clumped d. stratified or layered e. homogeneous
Synovial membranes are found in
a. the stomach. b. the heart. c. the lungs. d. tendon sheaths and joint capsules. e. ureters and the urethra.
Which of the following is a true statement about body size and physiology?
A) The amount of food and oxygen an animal requires and the amount of heat and waste it produces are inversely proportional to its mass. B) The rate at which an animal uses nutrients and produces waste products is independent of its volume. C) Small and large animals face different physiological challenges because an animal's body mass increases cubically while its surface area increases as a squared function. D) The wastes produced by an animal double as its volume doubles and triple as its surface area triples.
Pyrimidines
What will be an ideal response?