Punnett Squares

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the genetic makeup of offspring from two parents.

Front

Why do scientists use Punnett Squares?

Back

To determine possible genotypes for offspring.

Front

What does 'G' represent in a Punnett Square for frog skin color?

Back

'G' represents green skin.

Front

What does 'g' represent in a Punnett Square for frog skin color?

Back

'g' represents brown skin.

Front

What is the chance of baby frogs having brown skin if the genotypes are GG and gg?

Back

0%.

Front

What is a Homozygous Dominant Genotype?

Back

A genotype with two identical dominant alleles, e.g., 'XX'.

Front

What is a Homozygous Recessive Genotype?

Back

A genotype with two identical recessive alleles, e.g., 'dd'.

Front

What is a Heterozygous Genotype?

Back

A genotype with one dominant and one recessive allele, e.g., 'Dd'.

Front

If a mother has the genotype 'dd', what are her alleles?

Back

Both alleles are recessive.

Front

What is the purpose of using letters in Punnett Squares?

Back

Letters represent different alleles of a gene.