1. Simple Dominance Mm x Mm Both Heterozygous parents Both parents
can fly
M m
M MM Mm
m Mm mm
Genotypic Ratio- 1 MM: 2 Mm: 1 mm
Genotypic Probability- 25% MM: 50% Mm: 25% mm
2. Codominance EE= Day Vision, EN=Day and Night Vision,
NN=Night Vision
E N
E EE EN
N EN NN
Genotypic Ratio: 1: 2: 1 (EE 25%; EN 50%; NN 25%)
Phenotypic Ratio: 1: 2: 1 ( 25% Day Vision; 50% Day and Night Vision;
25% Night Vision)
3. Sex-Linked Inheritance. Carrier female and Normal(claw) Male
Xc Y
XC XCXC XCY
XC XCXc XCY
Half of the females will be carriers
Half of the females will be homozygous for no claws
Half of the males will have claws
Half of the males will not have claws
4. Simple Dominance Tt x Tt Heterozygous female crossed with
a Heterozygous male
T t
T TT Tt
t Tt tt
Genotypic Ratio- 1TT: 2Tt: 1 tt
Genotypic Probability (percentage)- 25% TT: 50% Tt: 25% tt
Phenotypic Ratio- 3 Fangs: 1 Molars
Phenotypic Probably (percentage)- 75% Fangs: 25% Molars
5. Incomplete Dominance Kk x Kk Kk-Small Spikes Kk-2, KK-1, kk-1
Both parents have small spikes
K k
K KK Kk
k Kk kk
Genotypic Ratio- 1: 2: 1 Percentage= KK-25% Kk-50% kk-25%
Phenotypic Ratio 1: 2: 1 Percentage= Large Spikes-25%, Small
Spikes=50%, No Spikes=25%
Phenotypic Ratio- 3 can fly: 1 cannot fly
Phenotypic Percentage- 75% can fly: 25% cannot fly