The offspring of a cross between a plant with purple flowers are 23 plants with purple flowers and 26 plants with white flowers. what are the genotypes of the parent plants?

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.

In what layer of the sun is energy transfers between atoms

Explain the significance of thesaurus geographicus