Question 19

Alleles refer to alternate forms of a gene for the same trait.

Alleles are different variations of a gene that can exist at a specific locus on a chromosome, influencing the expression of a particular trait.

A) Genotypes

Genotypes represent the genetic constitution of an individual, specifically the alleles present at a particular locus. While genotypes include alleles, they are not specifically alternate forms of a gene; rather, they describe the combination of alleles an individual has.

B) Alleles

Alleles are indeed the correct term for alternate forms of a gene that can determine variations in traits. Each allele can produce a different phenotype, which is why they are essential in genetics.

C) Gametes

Gametes are reproductive cells that carry half the genetic information of an organism (sperm and egg cells in animals). They do not refer to alternate forms of a gene but instead contain alleles that can combine during fertilization.

D) Phenotypes

Phenotypes are the observable characteristics or traits of an organism, which result from the interaction of its genotype with the environment. While phenotypes are influenced by alleles, they are not synonymous with alternate forms of a gene.

Conclusion

The term "alleles" is definitive in describing alternate forms of a gene for the same trait, making it the correct answer. Other options, such as genotypes, gametes, and phenotypes, do not accurately capture this specific genetic concept, highlighting the uniqueness of alleles in genetic terminology.