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HomeHomework HelpbiologyGenes and Alleles

Genes and Alleles

Genes are segments of DNA that encode instructions for the synthesis of proteins, influencing an organism's traits. Alleles are different versions of a gene that arise through mutations and can result in variations in those traits.

beginner
2 hours
Biology
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Overview

Genes and alleles are fundamental concepts in genetics that explain how traits are inherited. Genes are segments of DNA that code for specific traits, while alleles are different versions of those genes. Understanding these concepts is crucial for studying inheritance patterns and genetic diversity ...

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Key Terms

DNA
Deoxyribonucleic acid, the molecule that carries genetic information.

Example: DNA is found in the nucleus of cells.

Gene
A segment of DNA that codes for a specific trait.

Example: The gene for eye color determines what color your eyes will be.

Allele
Different versions of a gene.

Example: The gene for flower color may have a red allele and a white allele.

Genotype
The genetic makeup of an organism.

Example: A plant's genotype may be homozygous for tallness (TT).

Phenotype
The observable traits of an organism.

Example: The phenotype of a plant may be tall or short.

Dominant Allele
An allele that expresses its trait even in the presence of a recessive allele.

Example: In pea plants, the allele for tallness (T) is dominant.

Related Topics

Genetic Variation
Study of how genetic differences arise within populations.
intermediate
Evolutionary Biology
Explores how genetic changes contribute to evolution over time.
advanced
Molecular Genetics
Focuses on the molecular structure and function of genes.
advanced

Key Concepts

DNAGenotypePhenotypeInheritance