Punnett Square Practice

Front

What does heterozygous mean?

Back

An organism with two different alleles for a trait (e.g., Aa).

Front

What does homozygous mean?

Back

An organism with two identical alleles for a trait (e.g., AA or aa).

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles (e.g., BB, Bb, bb).

Front

What is a phenotype?

Back

The observable characteristics or traits of an organism, determined by its genotype.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup, while phenotype refers to the physical expression of traits.

Front

What does it mean if an organism is homozygous dominant?

Back

It has two dominant alleles for a trait (e.g., AA).

Front

What does it mean if an organism is homozygous recessive?

Back

It has two recessive alleles for a trait (e.g., aa).

Front

What is a Punnett Square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

Front

In a Punnett Square, what do the letters represent?

Back

The letters represent the alleles contributed by each parent.

Front

If a red flower (Rr) is crossed with a white flower (rr), what are the possible genotypes of the offspring?

Back

0 RR; 2 Rr: 2 rr.