Answer: B. Genes
Explanation:
Got it right on the test.
Answer:
A.because dna is our blood not sure
The sickle form of the hemoglobin gene is created when an adenine nucleotide is changed to a thymine. ... That single amino acid replacement in the -globin protein alters the shape and the chemistry of the hemoglobin molecule, causing it to polymerize and distort the red blood cell into the sickle shape.
Coral snakes imitates king snake-mimicry
also body coverings such as fur on a bear