Ageneticist discovered a new species of flower with very bright red petals (r) which are dominant to white petals (r), and round leaves (l) which are dominant to oblong leaves (l). she wanted to observe what the offspring would look like when she crossed the following two individuals: rrll x rrll. which of the following best describes the parent’s phenotypes?

a. rrll has red petals and round leaves; rrll has white petals and oblong leaves
b. rrll has red petals and oblong leaves; rrll has white petals and round leaves
c. rrll has white petals and round leaves; rrll has white petals and oblong leaves
d. rrll has white petals and oblong leaves; rrll has red petals and round leaves
e. rrll has red petals and oblong leaves; rrll has red petals and round leaves

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.

Which organelle stores most of a cell’s dna?