Answer:
Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain. The chemical backbones of the double helix are made up of sugar and phosphate molecules that are connected by chemical bonds, known as sugar-phosphate backbones.
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Answer:
C. 30 -40
Explanation:
90% edge
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<span>the alleles that control which blood group antigens appear on the suface of red blood cells are codominant.</span>