Punnett Squares

Front

What is DNA?

Back

DNA is the molecule that carries the genetic instructions for life, serving as the blueprint for traits of all living things.

Front

What does a Punnett Square show?

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 is a dominant allele?

Back

A dominant allele is a version of a gene that is expressed in the phenotype even when only one copy is present. It is represented by a capital letter.

Front

What is a recessive allele?

Back

A recessive allele is a version of a gene that is only expressed in the phenotype when two copies are present. It is represented by a lowercase letter.

Front

If a tall plant (TT) is crossed with a short plant (tt), what will the offspring be?

Back

All of the offspring will be tall.

Front

What is the probability of getting a tall plant from a Tt x Tt cross?

Back

The probability of getting a tall plant is 75%.

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 TT or tt.

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 Tt.

Front

In a Punnett Square, what do the letters on the top and side represent?

Back

The letters on the top and side represent the alleles contributed by each parent.

Front

What is the likelihood of getting a green offspring (G) if the parents are Gg and gg?

Back

The likelihood of getting a green offspring is 50%.