If a gene has two alleles, there are two possible genotypes.

a. True

b. False

b. False

Explanation:

Genetics can be defined as the scientific study of hereditary in living organisms such as humans, animals and plants.

Heredity refers to the transfer of traits (specific characteristics) from the parent of a living organism to her offspring through sexual reproduction or asexual production. Some examples of hereditary traits are dimples, tongue rolling, baldness, handedness, freckles, curly hair, color blindness, height, etc.

According to Mendel's Law of Dominance, if a gene has two alleles, there are three (3) possible genotypes.

The three (3) possible genotypes are;

I. A combination of alleles such as AA.

II. A dominant combination (phenotype) such as Aa.

III. A recessive combination such as aa.

Where;

Also, a single version of a gene expressed by a living organism is referred to as an allele.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.