In pea plants, the allele for purple flowers (P) is dominant to the allele for white flowers (p). In a cross between a purple-flowered plant and a white-flowered plant, all 73 of the offspring plants had purple flowers
Which cross would provide such results? A) pp × pp
B) Pp × Pp
C) PP × PP
D) PP × pp
D
You might also like to view...
The diagram below represents a protein electrophoresis gel with samples from six individuals tested for variants (alleles A and B) of a single protein. What are the genotype frequencies?
A. 33.3% A, 66.6% B B. 75% A, 25% B C. 25% B, 75% A D. 66.6% A, 33.3% B E. Can't determine the frequency from this information.
Which of the following occurs during a nerve impulse?
A. Sodium ions flow out of the cell. B. Sodium ions flow into the cell. C. Potassium ions are pumped into the cell. D. Potassium ions are pumped out of the cell.
Which of the following is an exogenous antigen?
A) a bacterium inside a cell B) a virus inside a cell C) a bacterium outside a cell D) a noninfected human cell E) the malaria parasite inside a red blood cell
Sulfur dioxide is added to "must" in the production of wine to
A) improve the flavor. B) allow more control over the fermentation process. C) provide a necessary nutrient for the fermentation process. D) prevent tannins from leaching out of wood into the fermenting wine. E) both enhance flavor and promote fermentation.