A gene is a portion of DNA that determines a certain trait. An allele is a specific form of a gene. Genes are responsible for the expression of traits. Alleles are responsible for the variations in which a given trait can be expressed.

Genes are found on tiny spaghetti-like structures called chromosomes (say: KRO-moh-somes). And chromosomes are found inside cells. Your body is made of billions of cells. Cells are the very small units that make up all living things.

chromosome
allele, also called allelomorph, any one of two or more genes that may occur alternatively at a given site (locus) on a chromosome. Alleles may occur in pairs, or there may be multiple alleles affecting the expression (phenotype) of a particular trait.

chromosomes
Answer: Genes are located in the chromosomes in the nucleus of the cell.

Genes are consist in chromosomes, which are in the cell nucleus. A chromosome contains hundreds to thousands of genes.

Different versions of the same gene are called alleles. Individual humans have two alleles, or versions, of every gene. Because humans have two gene variants for each gene, we are known as diploid organisms.

Answer. Genes are located on thread-like structures called chromosomes. These are present inside the nucleus.

cell nucleus
Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.

A gene is a unit of hereditary information. Except in some viruses, genes are made up of DNA, a complex molecule that codes genetic information for the transmission of inherited traits. Alleles are also genetic sequences, and they too code for the transmission of traits.

The relationship between genes and alleles is a gene is a sequence of DNA while the allele is a version. there are two alleles with every gene. for example gene:hair color there are two alleles 1 from mom and 1from dad so moms allele for hair color would be brown and dads allele for hair color is blonde but they are the same gene.

Alleles determine different traits, which carry different phenotypes. As an example, the gene responsible for the flower color of pea plant ( Pisum sativum ) carries two forms, one allele determines the white color, and the other allele determines the red color. These two phenotypes red and white are not expressed simultaneously in one individual.

Examples of Multiple Alleles. The human ABO blood type is a good example of multiple alleles. Humans can have red blood cells that are of type A (I A), type B (I B), or type O (i).

Genes and Alleles. Genes are pieces of DNA that code for traits expressed by the individual.