science
Grade-10
Easy

Question

An allele is considered as:

  1. A homozygous genotype

  2. A heterozygous genotype

  3. Several possible forms of a gene

  4. Another word for a gene

Hint:

Variants of a particular gene are observed in nature.

The correct answer is:

Several possible forms of a gene


    • An allele refers to DNA sequences present in a particular locus
    • The allele is the different versions or variants that are possible for a specific gene
    • Eye color is a gene while the variants found in eye color (like blue eyes, brown eyes) are due to alleles
    • For a particular gene two alleles are present
    • The allele is expressed as the phenotype
    • Usually the dominant allele will be expressed

    • Alleles are sequence of nucleic acid that determine the phenotype of an organism

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