Looking at figure 20.15, what does it mean for a snp to be "linked" to a disease-associated allele? how does this allow the snp to be used as a genetic marker? (see concept 15.3.)

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2%? i tried finding the exact sorry if it's not 100% correct ; -;

c. heat from the poles back down towards the equator.

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called