In an organism, complementation is observed when the two strains with the different homozygous recessive mutations are mated or crossed to produce an offspring having wild-type phenotype.
<u>Complementation is observed when the mutations are present in different genes.</u>
<u>Therefore, mutations are said to be</u><u> complementary, </u><u>if they are present in different genes.</u>
There are 4 electrons altogether shared between carbon atoms in a molecule of C2H4, to be more precise there are 2 electron pairs shared between the carbon atoms.
