Complex Patterns of Inheritance
Ch 11
Summary
Exceptions to Mendelian
Genetics
• Polygenic
• Incomplete Dominance
• Co-Dominance
• Multiple Alleles
• Pleiotropy
• Gene linkage
• Sex-linked Traits
OTHER Extension:
• Karyotype
• Pedigrees
– Patterns of inheritance
– Inferring genotype
• Non-disjunction
- trisomy
Where is this happening again?
Poly-genic Traits
Complete Dominance
Different?
Multiple Alleles
glycoproteins = antigens
Uni
Uni
Compare and Contrast
Pleiotropy: Cystic fibrosis is a good of example of pleiotropy, where a mutation
in a single gene affects multiple systems in this case the lungs, pancreas, and
sweat glands
BIO SmartStarter – 11/20/15
Xb - Color Blind
XB – not Color Blind
1. Make a Punnett
square for the cross
illustrated here.
2. What are the
genotypic and
phenotypic ratios
(probabilities) for the
offspring?