Purple flower (A) is dominant over white flower (a), and tall stem (B) is dominant over short stem (b). The Punnett square

represents a cross between two dihybrids (AaBb ? AaBb).
In the figure above, how many plants would have the genotype AaBb?



a. 1
b. 3


c. 4
d. 6
e. 9


ANSWER: c

Biology & Microbiology

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Fill in the blank(s) with correct word

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The atomic number is the number of

a. neutrons and protons. b. neutrons and electrons. c. protons and electrons. d. protons only. e. neutrons only.

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The lymph vascular system begins at

a. the heart. b. the veins. c. the arteries. d. the arterioles. e. the capillaries.

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When light hits a pigment, how many electrons are excited by a single photon?

a. one b. two c. three d. four

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