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MENDELISM (Chi-square analysis (degrees of freedom (df) (df = n-1,…
MENDELISM
Chi-square analysis
formula
degrees of freedom (df)
df = n-1
monohybrid n=2
dihybrid n=4
null hypothesis (H0)
data fit predicted ratio
probability value (p) = 0.05 (5%)
progeny testing
Factors contributed to Mendel's success
discrete traits
restrict to contrasting traits
choice of suitable organism (garden pea)
accurate quantitative records
Crossing
monohybrid (principle of dominance & segregation)
Tall x dwarf
F2 = 3:1
differing in only one traits
Terms
recessive (r)
genes
dominance (R)
alleles
Test cross
DD x dd (all tall)
Dd x dd (1:1)
dihybrid (principle of independent assortment)
F2 = 9:3:3:1
GGWW x ggww
Probability & statisics
probability = number times event occurs/
total number events
Mendel's study of heredity