2. General Genetics Cayla Doner Science December 15 th –16 th

3. Incomplete Dominance  This is when one gene does not completely hide the other gene.  It is also known as blending.

4. Incomplete Dominance  An example is a female white mouse and a male black mouse producing a gray mouse.

5. Mendelian Inheritance  Gregor Mendel studied traits passed from generation to generation in pea plants such as height, color, and shape.  Medelian principles of heredity: 1. Traits are controlled by alleles, which are types of cells. 2. Alleles are either dominant or recessive. 3. Alleles on chromosomes are spread out onto different sex cells.

6. Mendelian Inheritance  Here are some traits Mendel found in pea plants.

7. Multiple Alleles  Multiple alleles are different forms of the same gene.  Multiple alleles=more than 2 forms of the same gene in that population.  For example: blood type: there are a total of six alleles= 3 from the mother and three from the father.

8. Polygenic Inheritance  Polygenic traits=more than one gene contributes to the phenotype.  Polygenic inheritance- The inheritance of traits are passed form parents to offspring.

9. Polygenic Inheritance  When a TRAIT is accompanied by a combination of GENES, rather than by a single gene.TRAITGENES  Height, skin color, and eyes are a few examples of polygenic inheritance.  It also occurs in wheat color and production of milk in cows.

10. The End