In the short-term response to hemorrhage, occurs.

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.

When does dna replication(make a copy of itself)?

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization