Punnett Square Practice

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What does heterozygous mean?

Back

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

Front

What does homozygous mean?

Back

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

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.

Front

What is the purpose of a Punnett Square?

Back

The purpose of a Punnett Square is to determine the probability of an offspring inheriting particular traits from its parents.

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., B in Bb).

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., bb).

Front

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

Back

The probability is 75%.

Front

If a parent has genotype BB and the other has bb, what are the possible genotypes of the offspring?

Back

The possible genotypes are Bb.

Front

What is the expected phenotypic ratio for a monohybrid cross?

Back

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