Law of purity of gamete states characters recovered in $F_{2}$-generation that was hiden $F_{1}$. Principle of Law of Segregation This law is also called the purity of gametes. This law states that the two factors of a character present in individual keep their identity distinct separate at the time of gametogenesis (meiosis) or sporogenesis, factors get randomly distributed to different gametes and then get paired again in different offspring as per the principle of probability. The principal of segregation can be deduced in Punnett square