Punnett Square Practice

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from two parents based on their genotypes.

Front

What does the term 'genotype' mean?

Back

Genotype refers to the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous genotypes have two identical alleles (e.g., BB or bb), while heterozygous genotypes have two different alleles (e.g., Bb).

Front

What does 'dominant trait' mean?

Back

A dominant trait is a characteristic that is expressed when at least one dominant allele is present in the genotype.

Front

What does 'recessive trait' mean?

Back

A recessive trait is a characteristic that is expressed only when two recessive alleles are present in the genotype.

Front

How do you determine the probability of an offspring having a specific trait using a Punnett Square?

Back

You fill out the Punnett Square with the parents' alleles and then calculate the ratio of offspring with the desired trait.

Front

What is the probability of a child being blue-eyed if both parents are heterozygous (Bb)?

Back

The probability is 25%, as shown in a Punnett Square.

Front

What does the term 'allele' refer to?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the significance of the boxes in a Punnett Square?

Back

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

Front

What is the expected genotype of offspring from a homozygous dominant (AA) and a homozygous recessive (aa) parent?

Back

All offspring will have the genotype Aa.