Answer:
A scientific law is simply an observation of the phenomenon that the theory attempts to explain. For example, suppose that you were lying under an apple tree and observed an apple fall from a branch to the ground. The observation of this phenomena can be called the law of gravity.
I believe the answer is sister chromatids in a chromosome.
To be exact 23 pairs of sister chromatids.
Hope this helps .
CPT Code 62270
CPT Code 62270 is under Injection, drainage or aspiration procedures of the spine and spinal cord. This is fitting for the patient who has had a diagnostic lumbar puncture where a small amount of cerebrospinal fluid is removed for laboratory testing.