1.
Chromosomes

2.
chromosome number: <ul><li>each organism has a characteristic number of chromosomes </li></ul><ul><ul><li>humans have 46 (in 23 pairs) </li></ul></ul><ul><ul><li>dogs have 78 (39 pairs) </li></ul></ul><ul><li>having a full set of chromosomes, the right types in the right numbers is important </li></ul>

3.
chromosomes ( X and Y)

4.
human karyotype

5.
commercial vs. wild strawberries <ul><li>polyploid </li></ul><ul><li>diploid </li></ul>

6.
bearded vs. wild irises <ul><li>polyploid </li></ul><ul><li>diploid </li></ul>

7.
calico cats are almost always female (otherwise they have a chromosomal abnormality

8.
gene mapping: <ul><li>sections of DNA that code for specific proteins are called genes </li></ul><ul><li>the proteins produced from these genes determine specific characteristics </li></ul><ul><li>genes exist in specific locations on specific chromosomes </li></ul>

10.
genes can now be added to chromosomes that will code for new traits