how electronegativity, or the difference in electronegativity between two elements, relates to the formation of polar bonds, non-polar bonds and ionic compounds.

People with one sickle cell allele are not likely to get malaria. what is this an example of?

Can result as a complication of diabetes due to damage to the arterial walls and excess fat in the blood.

Some steps in cell division are shown below: 1. chromosomes condense and pair up 2. segments of dna of sister chromatids twist and cross 3. exchange of dna occurs between chromosomes 4. four daughter cells are created that are haploid which of the following steps is least likely to occur during meiosis 1?