Genes determines the genotype of an organism.
What is gene?
- "The basic physical and functional unit of heredity is the gene."
- DNA is the material that makes up genes.
- Some genes codes for the production of proteins. Many genes, however, do not code for proteins. Alleles are different variants of the same gene.
- There can be two or more alleles in a gene.
What do you mean by genotype?
- "The term genotype refers to an organism's whole complement of genes."
- In other words, it describes its genetic composition.
- In a more restricted meaning, the term can refer to the alleles (alternative forms of a gene) that an organism carries.
Hence, the correct answer is genes.
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