Why are there genetic differences between parents and offspring?

there are differences because they can accumulate over generations so that descendants are very different
hope this helped:)

Ifound this on google “these two compounds have a different ionic structure. caesium ion is larger in size when compared to the sodium ion. the charge gets more area to spread out evenly. so caesium chloride has a lower melting point than sodium chloride.” i hope this you for what your looking for