There are 4 bases:
Adenine,
Thymine,
Guanine,
Cytosine.
"SCIENTIFIC" is the answer to this question,
hugs :))
Answer:
During metaphase, the cell's chromosomes align themselves in the middle of the cell through a type of cellular "tug of war." The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.
