Commercial grape growers use ____ to get larger grapes by lengthening the stem on which fruits develop
a. abscisic acid
b. ethylene
c. auxins
d. salicylic acid
e. gibberellins
ANSWER: e
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Transgenic mice engineered to contain the mutant versions of the huntingtin gene with various numbers of _____________________ repeats have phenotypes similar to humans affected by Huntington disease
Fill in the blank(s) with correct word
Which of the following is not exhibited by a polygamous mating system?
A. The male will kill offspring if they interfere with mating. B. The females provide care for their offspring. C. The male mates with numerous females. D. The females provide food for their offspring. E. The male defends vulnerable offspring.
A cow with black and white patches is produced from a white bull and a black cow. This is an example of
a. incomplete dominance. b. Codominance. c. dominance/recessive trait. d. Pleiotropy.
If the allele for inflated pea pods (I) is dominant to the allele for constricted pods (i), then the cross Ii xii is expected to produce
A) 3/4 with constricted and 1/4 with inflated pods. B) all peas with inflated pods. C) 3/4 with inflated and 1/4 with constricted pods. D) half with inflated and half with constricted pods. E) all peas with constricted pods.