A genome is all the DNA in an organism, including it's genes. Genes carry information for making all the proteins required by all organisms. These proteins determine, among other things, how the organism looks, acts, processes and fights infections. DNA is made up of four similar chemicals bases, adenine , Thymine , cytosine , and guanine that are repeated millions or billions of times throughout a genome. The human genome has three billion base pairs. The order of these base pairs are extremely important and determine everything in an organism. The Human Genome Project started in the mid-1980's and was...
chromosome's long arm. Scientists speculate that this gene scarcity could contribute to individuals with trisomy 21.

Chromosome 5 Diseases linked to chromosome 5 are; colorectal cancer, basal cell carcinoma, acute myelogenous leukemia, salt-resistant hypertension, and a type of dwarfism.

Chromosome 16 Diseases linked to chromosome 16 are; breast and prostate cancers, Crohns disease and adult polycystic kidney disease.

After the full genome sequencing is done there are some things we still will not know such as; Gene number and exact locations and functions, gene regulation, DNA sequence organization, interaction of proteins in complex molecular machines, and developmental genetics, genomics.