"nodes of ranvier" in a sentence. definition: gaps between the myelin sheath where sodium and potassium ions pass through during an action potential. location where “electrical” conduction takes place. (pls make it not sound like a googled sentence)

Pink fur (p) is dominant to purple fur (p) in hamsters. two heterozygous pink hamsters are crossed. what is the probability that these two parents will have an offspring with purple fur? 2/4, 1/2 or 50% 1/4 or 25% 3/4 or 75% 4/4 or 100% there is no chance for this type of offspring