What are alleles in the context of genetics?

What are alleles in the context of genetics?

• A. Different genes on separate chromosomes
• B. Similar versions of the same gene
• C. Different versions of a gene at the same locus
• D. Genetic mutations affecting traits

Answer: (C)

Alleles refer specifically to different versions of a gene that occupy the same locus on homologous chromosomes. Each individual typically inherits one allele from each parent for a given gene, making it possible for variations to occur. These variations can lead to differences in traits, such as flower color in plants or blood type in humans. The concept of alleles emphasizes their role as alternative forms of a single gene. For example, the gene responsible for eye color may have alleles for blue, brown, or green eyes. While the other choices discuss related genetic concepts, they do not accurately capture the definition of alleles. Distinguishing between different genes or referring to genetic mutations does not focus specifically on the concept of alleles. Instead, recognizing that alleles are variations of a gene at the same position on homologous chromosomes is key to understanding genetic diversity and inheritance.

Alleles refer specifically to different versions of a gene that occupy the same locus on homologous chromosomes. Each individual typically inherits one allele from each parent for a given gene, making it possible for variations to occur. These variations can lead to differences in traits, such as flower color in plants or blood type in humans.

The concept of alleles emphasizes their role as alternative forms of a single gene. For example, the gene responsible for eye color may have alleles for blue, brown, or green eyes. While the other choices discuss related genetic concepts, they do not accurately capture the definition of alleles. Distinguishing between different genes or referring to genetic mutations does not focus specifically on the concept of alleles. Instead, recognizing that alleles are variations of a gene at the same position on homologous chromosomes is key to understanding genetic diversity and inheritance.