If jordan had an identical twin, what is the likelihood that his brother would also develop this cancer?

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.

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

Which of these statements are true about scientific theories and hypothesis