1. Sexual Reproduction

2. Benefits of Sexual Reproduction?

3. How could this lead to Evolution?

4. Genetic Dominance
Every organism who reproduces sexually receives genetic material from both partners.
In order to demonstrate a dominant trait, an organism only requires 1 dominant allele (part of a gene)
In order to demonstrate a recessive trait, an organism must have 2 recessive alleles

5. Homozygous = 2 of the same types of alleles (dominant or recessive)
Heterozygous = 2 different alleles (1 dominant 1 recessive)
Choose any letter to represent the same allele, then use CAPITAL or lower case to determine dominance

6. Punnett Squares
Simple graphical and mathematical analysis of the potential genetic combinations that could occur in offspring
Dominant alleles are represented with CAPITAL LETTERS
Recessive alleles are represented with lower case letters
For science 20 we will put the mother across the top and the dad vertically along the side of the punnett square

7. Example
Determine the % probability that a mother with blue eyes and a father with heterozygous brown eyes have a blue eyed child