Phenotype, Genotype, and Punnett Squares

Phenotype and Genotype CFU

by Aimee Tabrizi

Fill in the Blank

A new creature is discovered and is found to be either dark colored or transparent.  Which trait is dominant and how can you tell?  

Fill in the Blank

In terms of fur color, what do you predict the phenotype of their offspring will be? How did you determine this?

​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