which statement best describes the relationship between an allele and a gene?
Which of the following best describes the relationship between a gene and an allele?
- A gene is a variant of an allele.
- A gene is always recessive to an allele.
- An allele is a variant of a gene.
- A gene is always dominant to an allele.
An allele is considered as a variant form of a gene. A single gene possess various forms and these all forms are located at the same gene locus. The different phenotype of a gene is due to varied combination of alleles.
For example – let “T” represents the allele for tall gene and “t” represents the allele for short gene and “T” is dominant over “t”. Genotype “TT” or “Tt” represents a tall species and genotype “tt” represents a short species.
Hence, option B is correct