What is the difference between DNA, chromosomes and genes?  I am confused because I don't know if chromosome is made of DNA or DNA is made of chromosomes. Where does a gene come into this. Please...

What is the difference between DNA, chromosomes and genes?

 

I am confused because I don't know if chromosome is made of DNA or DNA is made of chromosomes. Where does a gene come into this.

Please make your answers simple a spossible for me to undersatnd. Thank you.

 

Asked on by najnim

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trophyhunter1's profile pic

trophyhunter1 | College Teacher | (Level 1) Educator Emeritus

Posted on

A chromosome is a structure that is made of a chemical known as deoxyribonucleic acid, or DNA as well as protein. Chromosomes are found in the nucleus of cells. Chromosomes contain many genes. A gene is a molecular unit of heredity.  Each gene codes for a polypeptide, which becomes a protein that performs a function in a living thing. The DNA molecules are very long and in order to fit inside the nucleus of a cell, they are highly coiled and condensed. During sexual reproduction, one haploid set of chromosomes is given to the offspring from each parent, forming a diploid amount of chromosomes in the offspring. Since chromosomes contain all of our genes, an organism that reproduces sexually gets a combination of genes from both parents. Genes that are expressed produce an organism's phenotype.

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salesgyaan's profile pic

salesgyaan | eNotes Newbie

Posted on

DNA or the double helix is in a gene, and genes are in chromosomes. Hope that makes it clear--something like elecron-atom-molecule order.

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