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Page 1: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983
Page 2: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

History of the Munchkin

• First noted in 1940’s during London Blitz

• Cat reappears in Stalingrad in 1953

• Pregnant cat found in

Rayville LA in 1983

Page 3: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

Munchkin Genetics

• Short bone structure in legs caused by a dominant allele

• What is the risk of breeding munchkin cats of unknown genotype?

Page 4: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

How Is Heterozygosity A Problem In The Domestication of Animals?

Page 5: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

Puggles & Labradoodles

Page 6: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

Dihybridization• The probability of inheriting two traits

may be determined using a 16 box Punnett square.

• Each parent makes 4 possible gamete combinations from the two homologous pairs associated with the traits

• As before, gametes must contain only one chromosome from each homologous pair

• Homologous pairs are reunited in the 16 possible zygotes

Page 7: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

Independent Assortment and Formation of Gametes

Page 8: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983
Page 9: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

Phenotypic Ratios

• Phenotypic:

• Dom1Dom2: Dom1Rec2: Rec1Dom2: Rec1Rec2

Page 10: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

Genotypic Outcomes

Page 11: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983

Sample Dihybridization

• Assume that the trait of smooth peas is dominant (S) relative to the trait of wrinkled peas (s)

• Assume that the trait of yellow peas (Y) is dominant to the trait of green (y)

• What proportion of the offspring from the cross of two true dihybrid parents (heterozygous for both traits) will belong to each of the four phenotypic categories?

Page 12: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983
Page 13: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983
Page 14: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983
Page 15: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983
Page 16: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983
Page 17: History of the Munchkin First noted in 1940’s during London Blitz Cat reappears in Stalingrad in 1953 Pregnant cat found in Rayville LA in 1983