Allele
Different forms of a gene
An allele is one of the alternative forms of a gene that exists in the DNA sequence at a specific locus (location) on a chromosome. Different alleles of a gene may produce different variations in phenotype (observable characteristics) of an organism, such as hair color, eye color or the shape of the earlobe. For instance, the gene that determines human blood type has three different alleles: A, B, and O. A person can have either two copies of the same allele, one copy of each allele, or no copies of an allele at all. The presence or absence of particular alleles affects the genetic makeup of an individual and can have important implications for their health, development, and susceptibility to certain diseases.
More Answers:
Understanding Heterozygous Genetics: Dominant and Recessive Alleles ExplainedUnderstanding the Law of Segregation: How Genetic Diversity Occurs During Sexual Reproduction
Understanding the Principle of Dominance in Genetics: Exploring the Role of Alleles in Inheritance and Traits.
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