In pea plants, a gene R produces red flowers and is dominant to a gene r, which produces white flowers. A gene T produces tall plants and is dominant to a gene t for short plants. If a plant that is homozygous for red flowers and heterozygous for tallness is crossed with a plant that is short and white, what will be the phenotypic ratio of the offspring?
A. one tall red:one short red
B. nine tall red:three short red:three tall white:one short white
C. three tall red:one short red:one tall white
D. one short white:two short red:one tall white
A. one tall red:one short red
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a. Trisomy b. Monosomy c. Polyploidy d. Chromosome inversion
The most acute allergic response is anaphylactic shock, which can be deadly due to the histamine-induced
A) increase in capillary permeability. B) increase in peripheral resistance that decreases cardiac output. C) decrease in peripheral resistance that decreases mean arterial pressure. D) decrease in peripheral resistance that increases cardiac output. E) local decrease in resistance with little effect on mean arterial pressure.
What are genetically modified organisms (GMOs) also called?
A) artificial crop plants B) artificially selected organisms C) transgenic organisms D) mutant crop plants
Which statement describes an earthworm's digestive opening?
a. It has two digestive openings and no typhlosoles. b. It has two digestive openings and typhlosoles. c. It has a single digestive opening and no typhlosoles. d. It has a single digestive opening and typhlosoles