a diverse gene pool ensures survival and dominancy, plus if you didn't the offspring would be mentally handicapped.
Genes
Nocleotides?
No, it's the other way round a chromosome conatins many genes. On humans one can contain anywhere between hundreds or thousands of genes, some are longer than others . A map of the human genome lives here: http://www.ncbi.nlm.nih.gov/mapview/map_search.cgi?taxid=9606
each chromosome has thousands of genes that play an important role in determining how an organism develops and functions
There is no such need. However, genes survive because they are passed on through the generations.
Thousands
There are thousands of genes in a chromosome.
Humans have about 20, 000 to 25,000 genes.
Genes
Of course they have genes. They need genes for survival and reproduction.
That depends on the gene: some genes have only a few alleles, some genes have hundreds or even thousands of alleles.
There are 25,000 human genes on 23 chromosomes. There are hundreds of genes on the smaller chromosomes and thousands on the bigger ones.
With a micro array , scientists can examine how active thousands of genes are.
Nocleotides?
yes
chromosomes
hundreds and thousands, no one probaly knows for sure. Genes make us what we are from our hair colour to our gender, our insulin production ect.. there are loads