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 (e.g., T) represent dominant alleles, while lowercase letters (e.g., t) represent recessive alleles.

Front

What is the genotype for a homozygous tall plant?

Back

TT

Front

What is the genotype for a homozygous short plant?

Back

tt

Front

What is the genotype for a heterozygous tall plant?

Back

Tt

Front

If T = tall and t = short, what is the phenotype of a Tt plant?

Back

Tall

Front

In a Punnett Square, what does each box represent?

Back

Each box represents a possible genotype of the offspring resulting from the combination of alleles from the parents.

Front

What is the probability of getting a homozygous recessive offspring (tt) from a Tt x Tt cross?

Back

25%.

Front

If B = brown fur and b = white fur, what is the phenotype of a Bb mouse?

Back

Brown fur.

Front

In a Punnett Square, how do you determine the probability of a specific phenotype?

Back

Count the number of boxes that show the desired phenotype and divide by the total number of boxes.