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 AA or aa.

Front

What does heterozygous mean?

Back

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

Front

What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present (e.g., T in Tt).

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present (e.g., tt).

Front

In a genetic cross, what does the letter 'T' typically represent?

Back

The letter 'T' typically represents a dominant trait, such as tallness in plants.

Front

In a genetic cross, what does the letter 't' typically represent?

Back

The letter 't' typically represents a recessive trait, such as shortness in plants.

Front

What is the probability of obtaining a recessive trait from two heterozygous parents?

Back

The probability is 25%.

Front

If a homozygous dominant brown mouse (BB) is crossed with a homozygous recessive tan mouse (bb), what will the offspring be?

Back

All offspring will be brown (Bb).

Front

What is the expected phenotypic ratio of a monohybrid cross?

Back

The expected phenotypic ratio is 3:1 for dominant to recessive traits.