Punnett Squares

Front

What does each box in a Punnett square represent in terms of offspring's genotype probability?

Back

25%

Front

In a heterozygous genotype, which allele takes over in the phenotype?

Back

Dominant

Front

If brown eyes are dominant over blue eyes, what is the probability of an offspring having brown eyes from a Bb x Bb cross?

Back

75%

Front

In a Punnett square with B = brown fur and b = white fur, what is the probability of getting white fur?

Back

50%

Front

What is the chance of a blue-eyed baby from two brown-eyed parents (Bb)?

Back

25%

Front

Define a Punnett square.

Back

A diagram used to predict the genotype and phenotype combinations of offspring from a genetic cross.

Front

What is a dominant allele?

Back

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

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present in the genotype.

Front

What is the genotype of an organism?

Back

The genetic makeup of an organism, represented by alleles.

Front

What is the phenotype of an organism?

Back

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