Alleles and Loci

Alleles and Loci - Alleles and Loci An allele is a gene...

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Alleles and Loci An allele is a gene that has more than one form. Each of the forms is referred to as an allele. For example, the gene for red flowers and the gene for white flowers are two different alleles. A locus (plural: loci ) is the location of a gene on a chromosome. The gene for red flowers and the gene for white flowers are two different alleles at the same locus. A single chromosome can have a gene for white flowers or a gene for red flowers but not both. There are two loci illustrated below, one is for flower color and the other is for stem length. Flower color has five alleles and stem length has two. Application Sickle-cell anemia is an abnormality of hemoglobin, the molecule that carries oxygen in our blood. Red blood cells of affected individuals often become distorted in shape, they then may break down or clog blood vessels causing pain, poor circulation, jaundice, anemia, internal hemorrhaging, low resistance, and damage to internal organs. This condition is caused by a recessive gene.
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Alleles and Loci - Alleles and Loci An allele is a gene...

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