punnet squares

• • Monohybrid cross– considering the inheritance of only 1 gene/ trait using a punnet square
• • Used to show expected outcomes of a genetic cross and possible genotypes and phenotypes in the offspring
• • The ratio of probability of genotypes in offspring written as:

  Homozygous dominant: heterozygous: homozygous recessive
• • The ratio of the probability of phenotypes observed in offspring is written as 

  Dominant phenotype: recessive phenotype