|Blood Type||Related Genotype(s)|
What is it called when a gene has multiple alleles?
Alleles are the pairs of genes occupying a specific spot called locus on a chromosome. Typically, there are only two alleles for a gene in a diploid organism. When there is a gene existing in more than two allelic forms, this condition is referred to as multiple allelism.
What are the three types of allele dominance?
Related Biology Terms
Codominance – When two dominant alleles are expressed separately, in different areas of an organism. Incomplete Dominance – When two dominant alleles are expressed equally, in every cell. Recessive Allele – An allele that is completely masked phenotypically by a dominant allele.
Which genes are dominant?
An allele of a gene is said to be dominant when it effectively overrules the other (recessive) allele. Eye colour and blood groups are both examples of dominant/recessive gene relationships.
What are some examples of multiple alleles?
Two human examples of multiple-allele genes are the gene of the ABO blood group system, and the human-leukocyte-associated antigen (HLA) genes. The ABO system in humans is controlled by three alleles, usually referred to as IA, IB, and IO (the “I” stands for isohaemagglutinin).
What are the multiple alleles?
More than two alternative alleles of a gene are known as multiple alleles in a population occupying the same locus on a chromosome or its homologue. … Multiple alleles express various alternatives of one trait. Different alleles can exhibit codominance, dominance-recessive behaviour or incomplete dominance.