Aguinea pig has two alleles for eye color; one allele codes for dark eyes and the other for red eyes. all of this guinea pig's offspring have dark eyes. this illustrates the principle of

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.

Someone me with this: a mineral' is determined by its actomic structure.

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america