1. Variations In Heredity incomplete dominance codominance sex linkage

2. Incomplete Dominance the traits in Mendel’s pea plants exhibited complete dominance some alleles interact to produce a new phenotype; this is called incomplete dominance

3. Snapdragons

5. Codominance in codominance both alleles are expressed at the same time

9. Thomas Morgan Hunt American geneticist (1866-1945) studied the fruit fly discovered sex linkage

11. Sex linkage terms… autosomal inheritance sex-linked X-linked Y-linked

12. Some sex-linked traits… red-green colourblindness hemophilia A male-pattern baldness

14. Pedigree Charts

15. Try the Practice questions on page 199…