The law of mass action suggests that

The law of mass action suggests that the rate of a chemical reaction is directly proportional to the product of the masses of the reactants. In this, each mass is raised to a power, which is equivalent to the coefficient of that reactant in the chemical reaction.

For example- For the chemical reaction-

aA + bB → C + D

Rate of the reaction α [A]ᵃ [b]ᵇ

Rate of the reaction = k [A]ᵃ [b]ᵇ

where, k = rate constant

a+b = order of the reaction.

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse