What is a difference between a gene and allele and dna and chromosomes?

So far i know that dna is stored in chromosomes, but do all 23 pairs of chromosomes carry different dna or do all chromosomes together form one dna. And is a gene a specific portion of dna?(like a slice of dna). and where does allele seem to be on the dna? can anyone give me some insight into it?What is a difference between a gene and allele and dna and chromosomes?
Each pair of chromosome carries a different set of DNA. A gene is, you could say, a specific portion of DNA--it's a set of alleles, or base pairs, that codes for a specific piece of information (i.e., eye color). Each chromosome has lots of alleles: an allele is one base pair (or nucleotide base, like an A or a C) on a strand of DNA. Here's the way I think of it, like a flow chart: alleles-%26gt;genes-%26gt;DNA-%26gt;chromosomes. Alleles make up genes, which make up DNA, which makes up chromosomes. Hope that helps!What is a difference between a gene and allele and dna and chromosomes?
allele - one of two more forms a gene at a given locus can take

gene - a unit of hereditary information, carrying the information for the production of a polypeptide

dna - the material of which genes are made

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