Punnett Squares

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 the term 'allele' mean?

Back

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

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype is the observable physical or biochemical characteristics.

Front

What does 'heterozygous' mean?

Back

Heterozygous refers to having two different alleles for a specific gene, such as Bb.

Front

What does 'homozygous' mean?

Back

Homozygous refers to having two identical alleles for a specific gene, such as BB or bb.

Front

What is a dominant allele?

Back

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

Front

What is a recessive allele?

Back

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

Front

How do you represent a dominant allele?

Back

A dominant allele is represented by a capital letter.

Front

How do you represent a recessive allele?

Back

A recessive allele is represented by a lowercase letter.

Front

What is the probability of a child having a trait if both parents are heterozygous?

Back

There is a 25% chance the child will express the recessive trait.