individuals are affected when they are homozygous recessive. carriers have not been labeled. referring to the pedigree below, which chromosome is the gene located

The answer is energy. the arrows are showing how exited and energized the stones are.

Dis the correct answer thats what i put and it was right 

A  reaction  in which  energy  is  released  to the surroundings is called an exothermic  reaction. in this type of  reaction  the enthalpy, or stored  chemical energy, is lower for the products than the reactants. when ammonium nitrate is dissolved in water,  energyis  absorbed  and the water cools.

The answer is centrioles forming happens in animal cell mitosis but doesn't happen in plant cell mitosis.