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

Question

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?

Answer 1

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->genes->DNA->chromosomes. Alleles make up genes, which make up DNA, which makes up chromosomes. Hope that helps!

Answer 2

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