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

How many alleles does an offspring receive from each parent?

Back

An offspring receives one allele from each parent.

Front

What does the genotype 'Bb' represent?

Back

The genotype 'Bb' represents a heterozygous condition, where one allele is dominant (B) and the other is recessive (b).

Front

What is the probability of an offspring having a dominant trait if both parents are heterozygous?

Back

The probability is 75%.

Front

What does the term 'dominant allele' mean?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

What does the term 'recessive allele' mean?

Back

A recessive allele is an allele that only expresses its trait when two copies are present in the genotype.

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

If purple (P) is dominant over white (p), what is the genotype of a purple flower that is homozygous?

Back

The genotype of a homozygous purple flower is 'PP'.

Front

What is the expected phenotypic ratio of a monohybrid cross between two heterozygous parents?

Back

The expected phenotypic ratio is 3:1.

Front

What is the significance of a test cross?

Back

A test cross is used to determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.