The eggs and sperm are the germ cells: the reproductive cells.
Each mature germ cell is haploid in that it has a single set of 23 chromosomes containing
half the usual amount of DNA and half the usual number of genes.
E xcept for the eggs and sperm, each cell in the human body -- there are 100
trillion cells in each of us -- contains the entire human genome, all the genetic
information necessary to build a human being, and this information is encoded within
the cell nucleus in 6 billion base pairs, subunits of DNA, packaged in 23 pairs
of chromosomes, one chromosome in each pair coming from each parent.
The germs cells -- the eggs and sperm -- are thus notable exceptions to the usual
rules governing chromosomes, genes, and DNA.
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