3.24

3.14

- Chromosomes: Genetic information within a cell

- Chromosomes are in the nucleus of a cell.

-Chromosomes: Is composed of a molecule called DNA. DNA forms a shape called the double helix. Sections of the molecule are called genes. One chromosome will have many jeans (possibly 1000).

- Each gene carries the info for the construction for a protein. The protein gives us the characteristic associated with the gene, (i.e blood group)

- Diff organisms have different number of chromosomes (cat 37, chicken 78, chimp 42, human 46)

- Chromosomes are known to operate in pairs, known as homologous pairs. Same Gene, in the same place on each chromosome in homologous pair. Same gene but different version

- Characteristic  2 versions of each. These versions are called Alleles