What two evolutionary agents are most responsible for decreases in genetic variation in a population?
What will be an ideal response?
Genetic drift and directional selection.
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Osmosis occurs as water can cross the lipid bilayer through specialized channels for water movement called ________________.
A. proteins B. transmembrane carbohydrates C. membrane pores D. aquaporins
In specialized transduction, virtually any genetic marker can be transferred from donor to recipient
Indicate whether the statement is true or false.
Each of the following citric acid cycle enzymes is subject to allosteric regulation except
A) isocitrate dehydrogenase. B) ?-ketoglutarate dehydrogenase. C) malate dehydrogenase. D) fumarate hydratase. E) pyruvate dehydrogenase.
Assume that a cross is made between two organisms that are both heterozygous for a gene that shows incomplete dominance. What phenotypic and genotypic ratios are expected in the offspring?
A) phenotypic 1:2:1; genotypic 1:3 B) phenotypic 1:2:1; genotypic 1:1:1:1 C) phenotypic 1:2:1; genotypic 1:2:1 D) phenotypic 1:1:1:1; genotypic 1:2:1 E) phenotypic 3:1; genotypic 1:2:1