Final answer:
An allele is a version of instructions for a gene, which can exist in different forms. Alleles can be dominant or recessive, influencing how traits are expressed in organisms. Understanding alleles is essential for studying genetics and inheritance patterns.
Explanation:
What is an Allele?
An allele is defined as a version of instructions for a gene. Genes are segments of DNA that carry the information to produce proteins, which ultimately determine an organism's traits. Alleles can exist in multiple forms, and individuals typically inherit two alleles for each gene, one from each parent. For example, a gene that determines flower color in plants may have a red allele and a white allele. The combination of these alleles can create a variety of traits, such as red or white flowers, or even a blend of both in some instances.
Additionally, alleles can be classified as dominant or recessive. A dominant allele will express its trait even when only one copy is present, while a recessive allele will only express its trait when two copies are present. This relationship affects how traits appear in the offspring.
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