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 does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as 'YY' or 'yy'.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as 'Yy'.

Front

What is the genotype for a yellow flower if yellow (Y) is dominant over white (y)?

Back

The genotype can be 'YY' (homozygous dominant) or 'Yy' (heterozygous).

Front

What is the phenotype for a genotype 'Yy'?

Back

The phenotype is yellow flowers.

Front

If round seeds (R) are dominant to wrinkled seeds (r), what is the genotype for a round seed that is heterozygous?

Back

The genotype is 'Rr'.

Front

What is the phenotype for a genotype 'rr'?

Back

The phenotype is wrinkled seeds.

Front

In a Punnett Square, what do the letters represent?

Back

The letters represent the alleles contributed by each parent.

Front

What is the purpose of a Punnett Square?

Back

The purpose is to predict the probability of offspring inheriting particular traits.

Front

If a plant has the genotype 'TT', what is its phenotype?

Back

The phenotype is typically tall, assuming 'T' is for tallness.