How does a law differ from a theory

law is a proven phenomenon, theory is just an explanation

A law is a fact that we can observe and be certain that is true in any condition or situation. A theory is an explanation for events, normally provides evidence gathered through investigation.

Explanation:

Law states what we can observe, it wont describe how that happens, but it's a fact that we can be certain of, because we can observe it. A theory in the other hand tries to explain why things happen, It involves an explanation about why certain events happen as they do and involves evidence normally gathered through investigations that back up the explanation.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.