Allele — Science definition
Defined in 2 courses:
- A version of a gene; an organism with paired chromosomes carries two alleles of most genes, which may be the same or different. (Life Science & Scientific Inquiry)
- A variant at a genetic locus. (Life Science: Biology)
Where it is taught
- DNA, Genes & Chromosomes — Genes, Cell Division & Heredity, Life Science & Scientific Inquiry, Grade 7
- Mendelian Genetics — DNA, Inheritance & Gene Expression, Life Science: Biology, Grade 10
In use
A gene can exist in different versions, and a version is an allele — one allele of a flower-colour gene may specify a product that makes purple pigment and another a product that does not.
DNA, Genes & Chromosomes
A test cross with aa can reveal a hidden recessive allele if an aa descendant appears under the model.
Mendelian Genetics