1. Genetics http://www.fdlrez.com/Education/teacherpages/mstracy/life. htm

2. What is heredity?  The passing of traits from parent to offspring.

3. Genes Genes on chromosomes control the traits that show up in an organism

4. Alleles  Alleles are the different forms of a trait that a gene may have  During meiosis a pair of chromosomes separate and the alleles move into separate cells.  Each chromosome now contains one gene for each trait

6. Genetics  The study of how traits are inherited

7. Who is Gregor Mendel?  The father of genetics  The first to use the mathematics of probability to explain heredity and to trace one trait for several generations

8. Hybrid  Receives different genetic information for a trait from each parent  Dominant allele: covers up or dominates the other trait  Recessive allele: the trait seems to disappear

9. Punnett Square  Probability helps you predict the chance that something will happen  You can use something called a punnett square to help you predict what an offspring will look like.

10. Punnett Square  Uppercase letters stand for dominant alleles  Lowercase letters stand for recessive alleles Parents’ genes

11. Genotype  Genotype is the GENETIC MAKEUP of an organism

12. HOMOZYGOUS  An organism with two alleles for one trait that are the SAME  Written TT or tt

13. HETEROZYGOUS  An organism with two alleles for one trait that are different  Written Tt

14. PHENOTYPE  The way an organism looks and behaves as a result of its genotype