A genotype is the collection of alleles that an organism possesses.
If the paired alleles are identical, the organism's genotype is homozygous for that trait; if they are not, the organism's genotype is heterozygous for that trait.
The genes that create a certain protein are in charge of the characteristic.
Genes are DNA segments that hold information for the production of RNA, which is then utilised to produce protein.
Each gene contains two alleles that tell the cell how to make protein to express the trait.