Punnett squares

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 alleles.

Front

What do the letters T and t represent in genetics?

Back

T represents a dominant allele (tall), while t represents a recessive allele (short).

Front

What is the purpose of using a Punnett square?

Back

To determine the probability of an offspring inheriting particular traits from its parents.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., TT or tt).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Tt).

Front

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

Back

25%.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a blend of traits (e.g., red and white flowers producing pink flowers).

Front

In a Punnett square, what does each box represent?

Back

Each box represents a possible genotype of the offspring based on the alleles contributed by each parent.

Front

What is the expected phenotypic ratio from a monohybrid cross?

Back

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

Front

What is the expected genotypic ratio from a monohybrid cross?

Back

The expected genotypic ratio is typically 1:2:1 for homozygous dominant, heterozygous, and homozygous recessive.