Which term describes an alternative form that a single gene may have for a particular trait?

• A. Phenotype
• B. Locus
• C. Allele
• D. Genotype

Answer: (C)

Verified step by step guidance

1. Understand that a gene can exist in different versions, each of which can influence a trait in a slightly different way.
2. Recall that the term 'phenotype' refers to the observable characteristics or traits of an organism, not the gene itself.
3. Know that 'locus' refers to the specific physical location of a gene on a chromosome, not the form of the gene.
4. Recognize that 'genotype' describes the combination of alleles an organism has for a particular gene, rather than the individual forms themselves.
5. Identify that the term 'allele' specifically means an alternative form of a single gene that can exist at a particular locus and influence a trait.