Warm Up 1 1/16 In corn, normal kernels (N) are dominant to waxy kernels. If you crossed a waxy kernel plant to a heterozygous normal plant what type of seeds would be produced? In humans, tongue rolling (T) is a dominant trait, those with the recessive condition cannot roll their tongues. Bob can roll his tongue, but his mother could not. He is married to Sally, who cannot roll her tongue. What is the probability that their first born child will not be able to roll his tongue?
Beyond Dominant and Recessive Alleles
How might this trait be inherited so that more than two phenotypes are possible?
Define the different types of complex inheritance patterns. OBJECTIVE: Define the different types of complex inheritance patterns.
REVIEW: Mendelian Mendel: Studied pea plants Dominant or recessive Phenotype: Yellow, Green Genotype: AA, Aa, aa
Some alleles are neither dominant nor recessive, and many traits are controlled by multiple alleles or multiple genes. Non-Mendelian
All inherit different traits 4 different patterns 1) Incomplete Dominance 2) Codominance 3) Multiple Alleles 4) Polygenic All inherit different traits
Incomplete Dominance No allele is completely dominant over another 4 o’clock flowers
Incomplete Dominance CC CS SS
Sickle Cell Anemia NN - Normal Blood Cells Nn – Produce Both Normal and Sickled Red Blood Cells nn - Sickle Cell Anemia 50% chance of death by age 20
Oompah Loopas can have red, blue or purple hair Oompah Loopas can have red, blue or purple hair. Purple hair results from the heterozygous condition. Odie Oompah has red hair and mates with Ona Oompah who has blue hair. What percent of their offspring have purple hair? First, make a “key”
Codominance Both alleles are fully and separately expressed
Codominance
What is the difference between incomplete dominance and codominance?
Multiple Alleles Genes with more than 2 alleles
Multiple Alleles
Polygenic Traits Traits controlled by 2 or more genes Range of phenotypes height, nose size, foot size, skin color
Different traits and organisms inherit through different patterns. 1) Incomplete Dominance 2) Codominance 3) Multiple Alleles 4) Polygenic Different traits and organisms inherit through different patterns.