Whats the difference between an allele and a gene?
An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given locus (position) on a chromosome. Usually alleles are sequences that code for a gene, but sometimes the term is used to refer to a non-gene sequence. An individual’s genotype for that gene is the set of alleles it happens to possess. In a diploid organism, one that has two copies of each chromosome, two alleles make up the individual’s genotype. An example is the gene for blossom colour in many species of flower — a single gene controls the colour of the petals, but there may be several different versions (or alleles) of the gene. One version might result in red petals, while another might result in white petals. The resulting colour of an individual flower will depend on which two alleles it possesses for the gene and how the two interact.
An allele is a viable DNA (deoxyribonucleic acid) coding that occupies a given locus (position) on a chromosome. Usually alleles are sequences that code for a gene, but sometimes the term is used to refer to a non-gene sequence. An individual’s genotype for that gene is the set of alleles it happens to possess. In a diploid organism, one that has two copies of each chromosome, two alleles make up the individual’s genotype. An example is the gene for blossom colour in many species of flower — a single gene controls the colour of the petals, but there may be several different versions (or alleles) of the gene. One version might result in red petals, while another might result in white petals. The resulting colour of an individual flower will depend on which two alleles it possesses for the gene and how the two interact. A gene is a locatable region of genomic sequence, corresponding to a unit of inheritance, which is associated with regulatory regions, transcribed regions and/or other fu
A gene is a DNA sequence that codes for a protein. An allele is used to describe any differing version of that gene. eg We all have the gene for eye colour. But we do not have the same eye colour (blue, brown, hazel). Therefore there are different alleles of the gene for eye colour. Now for some advanced stuff. As to which gets picked, is the concept of dominance. One allele may have dominance over another allele. For example a child’s mother may have 2 dominant brown eye alleles (BB) and the father may have 2 recessive blue eye alleles (bb). The child will have one dominant brown eye allele, and one recessive blue eye allele. Therefore the child will have brown eyes as the blown eye gene takes over and dominates the recessive allele. I hope that this has been helpful. I do not know your extent of knowledge, so please excuse me if this was too advanced or simple.
