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 'dominant' mean in genetics?

Back

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

Front

What does the term 'recessive' mean in genetics?

Back

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

Front

What is the phenotype of a genotype Pp?

Back

The phenotype is purple, as purple flowers are dominant to white.

Front

What is the probability of offspring having black eyes from a cross between a heterozygous black-eyed guinea pig and a red-eyed guinea pig?

Back

The probability is 50%.

Front

What is the phenotype of a genotype HH in guinea pigs?

Back

The phenotype is short hair, as short hair is dominant to long hair.

Front

What is the probability of offspring having black eyes from a cross between two heterozygous black-eyed guinea pigs?

Back

The probability is 75%.

Front

What percentage of offspring will have folded ears from a cross of two heterozygous cats with folded ears?

Back

75% of the offspring will have folded ears.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.