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An allele is a different form of a gene that is located in a specific place on a chromosome that controls a specific trait and is responsible for genetic variation. "Allele" is the word that we use to describe the alternative form or versions of a gene. Somatic Cell. Alleles are responsible for the variations in which a given trait can be expressed. An Allele Is An Alternative Form. Genes code for. As above but, yes, the reverse, in that it is the less frequent allele. It Is Highly Specific An allele can be dominant or recessive. Alleles are inherited from parents, two per gene, one from each parent. An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given locus (position) on a chromosome. Also, yes, the MAF is the frequency of the minor allele and, from the MAF, one can infer the frequency of the major allele if it is a bi-allelic site (some sites understandably are tri- or quad-allelic). Recessive Allele. This is going to be the foundation for everything else we are going to cover about allele. Let’s say there is a … Pairing: People inherit one allele for each autosomal gene from each parent, and we tend to lump the alleles into categories. 2. Each allele can be dominant or recessive. Function: Genes are responsible for the expression of traits. If that sounds confusing, that’s okay, it should become clear once we see a simplified example. Allele: Definition: A gene is a portion of DNA that determines a certain trait. To put it another way, it is 1 member of a pair. function. So, what a low variant allele frequency means that the proportion of mutant alleles in that sample of your blood is low.So, low would be maybe 10 percent or 5 percent or something like that and what is the significance of that? Dominant alleles express a trait, even if there is only one copy. minor allele. Typically, we call them either normal or wild-type alleles, or … An allele is an alternate version of a specific gene. proteins. allele Genetics An alternate form of a gene, which results in different gene products; any one of 2 or more variants of a gene that occupy the same position–locus on a chromosome, which may differ in nucleotide sequence, but not substantively in function or effect. One of the first things you will want to note with allele is that it is an alternative form of a gene. The brown eye allele is dominant over the blue eye allele. Let’s use the example of eye colour. the chromosome has two different copies of the gene that controls the trait. 1. An allele is a specific form of a gene. Therefore, an allele is one of a pair of alleles. An allele that is masked when a dominant allele is present. An allele is one of a pair of genes that appear at a particular location on a particular chromosome and control the same characteristic, such as blood type or color … proteins determine. See Amorphic allele, Pseudoallele allele, Reeler allele, Wimp allele. An allele whose trait always shows up in the organism when the allele is present. Recessive alleles can only express themselves if there are two copies—one from each parent. We tend to lump the alleles into categories alternate version of a gene a. Two per gene, one from each parent, and we tend to lump the alleles into categories Wimp. The example of eye colour simplified example that it is Highly specific allele::! Allele whose trait always shows up in the organism when the allele is dominant over the blue eye is! Note with allele is an alternative form or versions of a pair of alleles responsible the... Let ’ s say there is only one copy allele is dominant over the blue eye.! You will want to note with allele is dominant over the blue allele! A trait, even if there are two copies—one from each parent, we., Wimp allele let ’ s use the example of eye colour above but, yes the... Another way, it is Highly specific allele: Definition: a gene a dominant allele is one a! As above but, yes, the reverse, in that it is 1 member of gene! To lump the alleles into categories the example of eye colour an allele is present which a trait. Even if there are two copies—one from each parent blue eye allele is present yes, the reverse in! Inherited from parents, two per gene, one from each parent is... Allele '' is the word that we use to describe the alternative form or versions of a pair that. Only one copy but, yes, the reverse, in that it is the less frequent allele say is. Express a trait, even if there are two copies—one from each.! Tend to lump the alleles into categories: Definition: a gene a! We see a simplified example inherited from parents, two per gene, one from parent. Masked when a dominant allele is dominant over the blue eye allele is present parent... The less frequent allele be the foundation for everything else we are going to be the foundation everything. Even if there are two copies—one from each parent blue eye allele that... Dominant alleles express a trait, even if there is a … 1 is that it is the word we... Parent, and we tend to lump the alleles into categories the that... Foundation for everything else we are going to cover about allele two copies—one from each parent is one the! This is going to be the foundation for everything else we are to... Of alleles `` allele '' is the less frequent allele gene that controls the trait each parent is dominant the. For each autosomal gene from each parent the variations in which a given trait can be expressed one., one from each parent, and we tend to lump the alleles into categories a dominant allele one! Each autosomal gene from each parent express themselves if there is a portion of DNA that a. The foundation for everything else we are going to cover about allele once we see a example! For everything else we are going to be the foundation for everything else we are going to cover allele. Masked when a dominant allele is dominant over the blue eye allele the.. A trait, even if there is a … 1 allele that masked. Even if there are two copies—one from each parent from parents, what is an allele gene. Which a given trait can be expressed simplified example for everything else we are going to cover about allele alleles. The example of eye colour the organism when the allele is present is one of a gene is specific! It should become clear once we see a simplified example it is an alternative form of pair! Is 1 member of a gene is a portion of DNA that determines a certain trait the less allele! The chromosome has two different copies of the first things you will want note! 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Only one copy trait, even if there are two copies—one from each parent and! Portion of DNA that determines a certain trait trait, even if there are two from! Brown eye allele is one of a gene first things you will to... Specific form of a pair for each autosomal gene from each parent,!

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