1. A gene is a piece of DNA that provides a set of instructions to a cell to make a certain protein, a locus is a specific position on a pair of homologous chromosomes, and a allele is any of the alternative forms of a gene that may occur at a specific locus.
1. A gene is a piece of DNA that provides a set of instructions to a cell to make a certain protein, a locus is a specific position on a pair of homologous chromosomes, and a allele is any of the alternative forms of a gene that may occur at a specific locus.
A gene locus refers to the specific position of a gene on a chromosome, while an allele refers to different versions of the same gene that can exist at a particular locus. In other words, a gene locus is the physical location of a gene on a chromosome, while an allele is a specific variant or form of that gene found at that locus.
homologous
The position is called locus (plural: loci).
An allele is essentially the same as a gene so there is no difference in quantity between the two in any cell. Gene is a more common general reference to genetic material at a particular locus whereas allele often refers to an example of variation at a gene locus. For example the allele for tall (T)
Alleles are the various forms of genes at a select gene locus. There can be only one allele or several.
Genotype is more inclusive than allele. Genotype refers to the genetic makeup of an organism, including all alleles present at a particular genetic locus. Allele is a specific form of a gene that can be present at a given locus within an organism's genome.
The term allele is often used interchangeably with the word gene. Allele/gene is used for the variations seen at each gene locus for a trait on the homologous chromosome pair. For example: If there are three alleles for a trait only two of the alleles will be represented in the genotype of any one individual. The alleles for basic blood types A, B and O are examples. In general the term allele is not used interchangeably with gene in conjunction with the terms locus or loci..therefore Gene locus or gene loci but not allele locus or allele loci.
An indiviual letter in a punnett square representing a gene is called an allele. The two genes ( one from each parent ) together is a genotype. There isn't really two forms of a gene.
epistatic
Multiple alleles means that for a specific locus on a chromosome there can be 3 or more forms of that gene (allele). Only one allele can be inherited because they are found on homologous chromosomes. Height is not a multiple allele because it is associated with many genes on several chromosomes (plus environmental factors) so this would be polygenic inheritance. Multiple allele trait is the ABO group. The allele for A B or O (3 alleles ) is found on the same locus, therefore only one of them could be inherited EXAMPLE: DNA
A genetic locus is the specific location on a chromosome where a particular gene is located. It serves as a unit that determines the expression of a specific trait due to the presence or absence of alleles at that locus.