User:Reshan05/ScienceBox

Chromosomes
Chromosome - tightly condenced package of DNA


 * 46 chromosomones in humans (23 from mother and father each)
 * Somatic cells (body cells) contain 2 sets of chromosomes (2n - diploid)
 * Gametes (sex cells) contain 1 set of chromosomes (n - haploid)

Genes
A gene is a basic physical and functional unit in heredity


 * genes are made out of DNA
 * every person has 2 copies of each gene (each inherited from one parent)
 * Genes may vary in size from few hundred to 2 million DNA bases
 * Made out of identical nucleotides

Kryotypes

 * Females have 2 X chromosomes


 * Males have an X and Y chromosomes

Others
Gene Loci -

Acid - Anything that delivers hydrogen ions to the media

Extra Notes

 * in 1953 Watson and Crickson set their hypothesis for the double helix strucure of DNA
 * from 1940 to 1953, significant work including DNA was performed by Chargoff, Watson and Crick