Punnett Square Practice

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What do the letters T and t represent in genetics?

Back

In genetics, uppercase letters (T) typically represent dominant alleles, while lowercase letters (t) represent recessive alleles.

Front

What is the genotype for a short plant if T=tall and t=short?

Back

The genotype for a short plant is tt.

Front

What is the phenotype ratio for a cross between Tt and Tt?

Back

The phenotype ratio is 3 tall : 1 short.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., TT or tt).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Tt).

Front

What is the allele combination for a yellow plant if G=green and g=yellow?

Back

The allele combination for a yellow plant is gg.

Front

How do you determine the possible alleles from a Punnett Square?

Back

You list all combinations of alleles from each parent to find the possible genotypes of the offspring.

Front

What is the expected genotype ratio from a cross between TT and tt?

Back

The expected genotype ratio is 100% Tt.

Front

What is the purpose of a Punnett Square?

Back

The purpose of a Punnett Square is to visualize and calculate the probability of different genotypes and phenotypes in offspring.