Dec 19, 2015
Genotypic Frequencies of Indian Dairy Cattle
AA = 0.031AB = 0.276BB = 0.693
AA = 0.023AB = 0.733BB = 0.244
What are the allelic frequencies of each breed?
Allelic Frequencies of Indian Dairy Cattle
A = 0.17B = 0.83
A = 0.15B = 0.49
What are the expected genotypic frequencies of each breed?
Expected Genotypic Frequencies of Indian Dairy Cattle
ExpectedAA = 0.029AB = 0.282BB = 0.689
How do you interpret these results?
ExpectedAA = 0.023AB = 0.150BB = 0.244
ObservedAA = 0.031AB = 0.276BB = 0.693
ObservedAA = 0.023AB = 0.733BB = 0.244
Kuru - a prion diseaseObserved Genotypic Freq. in South Fore’
MM = 0.221MV = 0.514VV = 0.264
Obs. Genotypic Frq. in
South Fore’ Cannibals
MM = 0.133MV = 0.767VV = 0.1
• Hedrick, Science, 2003
Other overdominance examples
• Sickle cell anemia• Warfarin resistance in rats• Transferrin genotypes in pigeons• MHC class II
Diopsids - Stalk-eyed Flies (Cyrtodiopsis dalmanni)
•Wilkinson, Amitin & Johns Integr. Comp. Biol., 2005