We are talking about chemical reaction here. In a chemical reaction, substances that react are called reactants, and substances which are formed are called products. Atoms in the reactants break their bond, rearrange themselves and form new bonds to make the product. So no atoms are added or removed, which is called law of conservation of atoms/mass.
Genotype heterozygous tells you the alleles are different, which is found in the genotype
The water vapor in the relatively warmer, and more moist air condensed, hence fogging your glasses. Warm moist air comes in contact with a colder surface, you get condensation.
Hope this helps!
I know 1 of them is Nature
