1. In Pea Plants, the allele for smooth seeds (S) is dominant over the allele for wrinkled seeds (s). In an experiment, when two hybrids are crossed, what percent of the offspring share the same genotype as the parents?
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
2. An organism has three independently assorting traits AaBbC. What fraction of its gametes will contain the recessive genes abc?
a. 0
b. 1/8
c. 1/4
d. 1/2
e. 3/4
3. When a seed is set in the ground, roots will grow downward while stems will grow upward. This plant behavior is an example of:
a. Hydrotropism
b. Chemotropism
c. Gravitropism
d. Thigmotropism
e. Circadian rhythm
4. Plant hormones that promote elongation and the development of buds and fruits.
a. Cytokinins
b. Auxins
c. Gibberelins
d. Abscisic acids
e. Ethylenes
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Answer:
1. e
2. b
3. a
4. c.
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