1. Patterns of inheritance
How are most traits inherited?
How do genes and the environment interact?

2. How are most traits inherited?
Most traits are the result of complex patterns of inheritance
Incomplete dominance
Codominance
Multiple alleles
Polygenic inheritance

3. Incomplete Dominance Occurs when one allele is only partially dominant
This has a phenotype of pink flowered offspring from red and white parents
In both cases, both sets of alleles are written with two capital letters

4. Codominance Occurs when both alleles for a gene are expressed equally
This phenotype is getting a chicken with both black and white feathers from a solid white hen, and a solid black rooster

5. Polygenic inheritance
Occurs when more than one gene affects a trait
This has many different phenotypes, like human height, or the time it takes a plant to flower

6. Genes and environmental factors
Environmental factors can effect the way genes are expressed
DNA strands zip and unzip to process certain chemicals ingested
Epigenetics is the study of how environmental stimulus can change genetic traits