In horses, black coat color is influenced by the dominant allele (B), and chestnut coat color by the recessive allele (b). Trotting gait is due to a dominant gene (T), pacing gait to the recessive allele (t). Give the phenotype and genotype of the horse you would use in a testcross to determine the genotype of a black trotter.
A. Black pacer, BB tt
B. Black trotter, BB TT
C. Chestnut trotter, Bb Tt
D. Chestnut pacer, bb tt
E. Chestnut pacer, Bb tt
Answer: D
You might also like to view...
Which regulatory mechanism is activated when the overall energy availability of a cell is high?
A. Citrate inhibits phosphofructokinase 1. B. ADP up-regulates phosphofructokinase 1. C. ATP inhibits phosphofructokinase 1. D. AMP up-regulates phosphofructokinase 1.
A scientist is studying several areas along an elevation gradient. Her study involves prescribed burns (purposefully set, low-intensity fires) in the different areas, followed by a comparison of the type and abundance of organisms that colonize them over the next ten years. What scale best describes her study?
A. Physiological ecology B. Ecosystem ecology C. Organismal ecology D. Community ecology E. Population ecology
Currently malaria ____
a. kills about two million people each year in the U.S. b. has no known treatment c. can be prevented with a vaccination d. can be prevented with the drug quinidine e. is a temporary infection
The __________ deliver(s) nutrient-rich blood from
the small intestine to the liver. a. renal arteries b. hepatic portal vein c. abdominal aorta d. inferior vena cava e. coronary arteries