An animal breeder asks your advice about which of a number of traits could most effectively be selected for in his herd. Which would you most correctly suggest?
A) a trait with high VE
B) a high VA relative to VP
C) a high VP relative to VG
D) a low h2 value
E) a low selection coefficient
B
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Which statement about calico cats is false?
A. Calico cats can be male or female. B. The different colored fur is due to the inactivation of one X chromosome. C. The variation in coat color is an example of an epistatic interaction. D. Calico cats are genetic mosaics.
Erectile dysfunction
a. Affects about 30 million men in the U.S. b. can be a complication of smoking. c. can be a complication of circulatory problems. d. usually affects men as they age. e. includes all of these.
Any allele that's present in a population exists because it increases fitness
Indicate whether the statement is true or false
Assume that one counted 67 plaques on a bacterial plate where 0.1 ml of a 10?5 dilution of phage was added to bacterial culture. What is the initial concentration of the undiluted phage?
A) 67 pfu/ml B) 0.1 × 105 pfu/ml C) 6.7 × 105 pfu/ml D) 6.7 × 10?5 pfu/ml E) 6.7 × 107 pfu/ml (pfu = plaque-forming units)