Speculate on the molecular basis for dominance and recessiveness, using flower color as an example, where red is dominant over white
What will be an ideal response?
If the trait is controlled by a gene responsible for synthesizing red pigment, the recessive allele could be a dysfunctional mutant. Red pigment would be made as long as there was at least one functional copy of the gene present–this is the essence of dominance, where the presence of a single allele is sufficient to mask the recessive allele.
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The data in the previous graphs indicate that _____
A) a hybrid zone was established after the completion of the bridge B) there was no migration between the two squirrel populations after the bridge was completed C) gene flow occurred from one type of squirrel into the gene pool of the other type of squirrel D) two-way migration of squirrels occurred across the bridge, but without hybridization E) some northern squirrels migrated south, but no southern squirrels migrated north across the bridge
Which of the following is not correctly matched?
A) defense protein - antibody B) enzymatic protein - collagen C) hormonal protein - insulin D) motility proteins - actin and myosin E) storage protein - seed proteins
A zoo is hand-rearing a group of orphaned white-crowned sparrows. What is the best approach to help prepare the males to attract mates when released into the wild?
A. Expose the males to female pheromones from their species, to initiate development of song circuits during the critical period. B. Expose the males to a mentor male bird singing their species' song during the critical period. C. Expose the males to a variety of birdsongs during the critical period. D. Expose the males to each other during the critical period, to initiate development of song circuits during the critical period.
The net gain of ATP per molecule of glucose metabolized to pyruvate using Entner-Doudoroff pathway is ________.
A. 4 B. 2 C. 0 D. 1