Answer:
The correct answers would be:
A gene is defined as a protein coding sequence of nucleotides which controls the phenotype of a particular character.
Usually, a gene exists in two alternative forms which are termed as alleles. The alleles control different phenotypes of the same character.
For example, tall and short plant, round and oval shape of a pea, green and yellow pea color, et cetera.
Similarly, Thick and thin eyebrows and curly and straight hairs are examples of alleles of a gene.
In contrast, large nose and oval face are two different characters which are controlled by two different genes.
Similarly, blond and curly are two characters of hairs (color and type) and thus, they are controlled by different genes.
