Using the example below, explain what happens when 1) An insertion mutation occurs

2) A deletion mutation occurs

*Hint* be sure to compare the 2nd and 3rd DNA sequences to the original on the top.

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.

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

How does a gymnosperm prevent itself from pollinating the same tree