Variants

Definition

Variants are different forms or versions of a gene that arise due to mutations. They can result in diverse physical traits and characteristics within a species.

5 Must Know Facts For Your Next Test

1. Variants occur due to changes or mutations in the DNA sequence of a gene.
2. Gregor Mendel’s experiments with peas demonstrated how variants can affect traits like flower color and seed shape.
3. Variants can be dominant, recessive, or co-dominant depending on their influence on an organism's phenotype.
4. Homozygous organisms have two identical variants of a gene, while heterozygous organisms have two different variants.
5. The study of gene variants and their distribution is known as population genetics.

Review Questions

Related terms

Allele:

An alternative form of a gene found at the same locus on homologous chromosomes.

Genotype: The genetic makeup of an organism that determines its specific traits.

Phenotype: The observable characteristics or traits of an organism resulting from the interaction of its genotype with the environment.