Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic outcomes of a cross between two organisms.

Front

What does the term 'phenotype' mean?

Back

Phenotype refers to the physical characteristics or traits of an organism, such as flower color or eye color.

Front

What does the term 'genotype' mean?

Back

Genotype refers to the genetic makeup of an organism, represented by letters (e.g., BB, Bb, bb).

Front

If purple flowers (P) are dominant over white flowers (p), what is the phenotype of a plant with genotype PP?

Back

The phenotype is purple flowers.

Front

If brown eyes (B) are dominant over green eyes (b), what is the genotype of a person with green eyes?

Back

The genotype is bb.

Front

What are the possible genotype outcomes for a cross between BB and bb?

Back

The possible genotypes are Bb.

Front

What is the probability of getting a square shape offspring from a heterozygous (Ss) and a round (ss) parent?

Back

The probability is 50%.

Front

What does it mean if an organism is heterozygous?

Back

An organism is heterozygous if it has two different alleles for a trait, such as Bb.

Front

What does it mean if an organism is homozygous?

Back

An organism is homozygous if it has two identical alleles for a trait, such as BB or bb.

Front

In a Punnett Square, what do the letters represent?

Back

The letters represent the alleles contributed by each parent.