Phenotype, Genotype, and Punnett Squares

Phenotype and Genotype CFU

by Aimee Tabrizi

​When you know the genotypes of the parents for a given trait, we can determine the probability/likelihood that their offspring will inherit certain features.

Multiple Choice

What is the genotype of each parent?

• Homozygous

• Heterozygous

• Homozygous Dominant

• Dominant

Multiple Choice

What is the probability that the offspring will be homozygous recessive?

• 1/2

• 1/4

• 3/4

• 1

Multiple Choice

What is the probability that the offspring will be heterozygous?

• 1/2

• 1/4

• 3/4

• 1

​Punnett Squares: a tool that is used to predict an outcome of a particular mating cross between parents.

Multiple Choice

Each parent has _____ possible _____ to pass on to each of their offspring.

• 1, allele

• 1, genotype

• 2, alleles

• 2, genotypes

​Punnett squares can be used to show why there is s 50/50 chance that a baby will be male or female