One of the alternative versions of a gene found at the same position on a chromosome.
Diploid organisms carry two alleles per gene, one from each parent. A population can hold many alleles, though an individual carries at most two. Alleles arise by mutation and differ by as little as one base.
Allele combinations determine genotype and, with the environment, the phenotype.
One of the alternative versions of a gene found at the same position on a chromosome.
Allele is one of the 54 topics in Genetics. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Heredity, Test Cross, Crossing Over.
The gene for human ABO blood type has three common alleles: IA, IB and i.
Allele is a Beginner topic, so no earlier topic is required. Other Beginner topics in Genetics that pair well with it include Heredity, Gene, Genotype and Phenotype.
The closest topics to Allele are Heredity, Test Cross, Crossing Over, Genotype and Phenotype. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Allele. To practise the whole of Genetics, use the Genetics quiz.
Allele: One of the alternative versions of a gene found at the same position on a chromosome. Heredity: The passing of traits from parents to offspring through genetic material. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Heredity and explain the difference aloud. Finally, take the Genetics quiz and come back to this page for any question you miss.
The passing of traits from parents to offspring through genetic material.
🧬 GeneticsCrossing an unknown dominant phenotype with a homozygous recessive to reveal its genotype.
🧬 GeneticsExchange of segments between homologous chromosomes in prophase I that creates new allele combinations.
🧬 GeneticsGenotype is an organism's allele makeup; phenotype is its observable traits resulting from genes and environment.
🧬 Genetics