1. Probability and inheritance of single traits

2. Mendel’s Math
Mendel allowed peas that were heterozygous for the seed shape to self-pollinate
F2 generation 3:1 ratio (Phenotypic ratio)
Each sex cell must have had an equal probability of getting the R allele as the r allele during segratation
P= number of ways that given outcome can occur
total number of possible outcomes

3. Punnett square Predictor of phenotypes of the progeny
Allow us to determine the expected ratio of genotypes (Genotypic ratio) and the phenotypes for a cross, probability of the particular genotype/phenotype will occur in the progeny of a cross.
Genotype of Rr:rr is
1:1 (2 Rr and 2 rr)
Phenotypic ratio is
1:1 (1/2 round and ½
Wrinkled)

4. What’s the probability that an offspring will have a phenotype of wrinkled seeds?

5. Test Cross
Cross of an individual of unknown genotype to an individual with recessive genotype – simplest way of determining genotype of an individual
Phenotype of the F1 generation of a test cross reveal whether an individual with a dominant trait (R) is homozygous (RR) or heterozygous (Rr) for the dominant allele

6. Pardon the Punnett Practice Questions 3 and 5 pg 604
Station practice
Punnett Practice