For a gene with two alternative alleles, A (with a frequency of p) and B (with a frequency of q), the term in the algebraic form of the Hardy-Weinberg equilibrium for the heterozygote genotype frequency is
A. q2.
B. p2.
C. 2Aa.
D. 2pq.
E. (p+q)2.
Answer: D
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Why do many plants use the photoperiodic pathway to regulate the timing of flower formation?
A. Flower petals carry out high levels of photosynthesis and require high light conditions. B. A minimum amount of light is always necessary for flowering. C. This allows plants to link flowering to temperature, which corresponds to the season when conditions are optimal. D. This allows plants to link flowering to day length, which corresponds to the season when conditions are optimal.
The DNA sequence recognized by restriction endonucleases is generally how long?
a. 1?2 nucleotides b. 4?8 nucleotides c. 10?15 nucleotides d. 24?32 nucleotides e. 36?47 nucleotides
If you partially hydrogenate oleic acid, the resulting molecule most likely would:a
lose a carbon atom. b. lose a carboxyl group. c. become soluble in water. d. contain more double bonds. e. have a double bond changed from cis to trans.
A scientist pollinates a true-breeding pea plant with violet, terminal flowers with pollen from a true-breeding pea plant with white, axial flowers. Which of the following observations would most accurately describe the F2 generation?
A. 75% violet flowers; 75% terminal flowers B. 75% white flowers in a terminal position C. 75% violet flowers; 75% axial flowers D. 75% violet flowers in an axial position