What percentage of the offspring
will have a heterozygous genotype
and a type A phenotype?

the fossil record provides evidence of a common ancestor to many species.

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