Human blood groups—A, B, AB, and O—exhibit which kind of inheritance pattern?
a. Wild type
b. Sex-linked
c. Codominance
d. Incomplete dominance
c. Codominance
Human ABO blood groups exhibit codominance, in which both alleles for the same characteristic are expressed at the same time in a heterozygote organism.
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The activity of acetylcholine in a synapse is terminated by its_____
A) active transport across the presynaptic membrane B) diffusion across the presynaptic membrane C) active transport across the postsynaptic membrane D) diffusion across the postsynaptic membrane E) degradation on the postsynaptic membrane
Which of the following is true about soil horizons?
a. They vary in number but are all of equal depth. b. There are always four of them, but they vary in depth. c. They vary in number and depth. d. There are always four of equal depth.
In a certain plant, when individuals with blue flowers are crossed with individuals with blue flowers,
only blue flowers are produced. Plants with red flowers crossed with plants with red flowers sometimes produce only red flowers, although other times they produce either red or blue flowers. When plants with red flowers are crossed with plants with blue flowers, sometimes only red flowers are produced; other times either red or blue flowers are produced. Which gene is dominant? What will be an ideal response?
The cell membranes of wall-less archaeons are strengthened by ________.
A. lipid-containing polysaccharide B. caldarchaeol C. glycoproteins D. All of the choices are correct.