1. Patterns of Inheritance

2. Dominant Vs. Recessive Dominant gene will always be displayed Recessive gene can “Skip” Generations Need 2 copies of recessive gene to be expressed

3. Incomplete dominance Blood type only 3 alleles for blood type (I A, I B, and i) A and B are co-dominant i is recessive Also has a Rh factor + or – Type A I A I A i Type AB I A I B Type B I B I B i Type O ii i

4. Rh + Rh Antigen O+O+ A+A+ B+B+ AB + *Universal Acceptor Rh- No Rh Antigen O - *Universal Donor A-A- B-B- AB -

5. Additive Alleles In some species flower color or skin color is the result of additive alleles The A allele produces a red pigment The a allele produces no pigment The Heterozygous Aa shows an intermediate color

6. Multiple additive alleles Skin color can be the result of multiple alleles That is why there is such variation within a population Each Capital Letter Allele produces a pigment, while each lower case does not Gametes ABC ABc AbC Abc aBC aBc abC abc ABC65545443 ABc54434332 AbC54434332 Abc43323221 aBC54434332 aBc43323221 abC43323221 abc32212110

7. Some genes are Sex-Linked Hemophilia (blood does not clot) Red-Green Color Blindness Recessive genes carried on the X Chromosome

8. More examples http://www.biologycorner.com/bio4/notes/beyond_mendel.php