Punnett Squares

Front

What is a Punnett square?

Back

A graph used to predict the possible genotypes of offspring in a given cross.

Front

What do dominant alleles represent in genetics?

Back

Dominant alleles are traits that are expressed when at least one dominant allele is present.

Front

How are dominant alleles represented?

Back

Dominant alleles are represented by a capital letter.

Front

What does the genotype 'AA' indicate?

Back

The genotype 'AA' indicates a homozygous dominant trait.

Front

What does the genotype 'aa' indicate?

Back

The genotype 'aa' indicates a homozygous recessive trait.

Front

What is the probability of obtaining a recessive phenotype from a cross of 'Aa' and 'Aa'?

Back

25%.

Front

If 'B' represents brown fur and 'b' represents white fur, what is the probability of obtaining brown fur from a cross of 'Bb' and 'bb'?

Back

50%.

Front

What is the phenotype of an organism with the genotype 'Aa'?

Back

The phenotype is dominant, showing the trait associated with 'A'.

Front

What is the phenotype of an organism with the genotype 'aa'?

Back

The phenotype is recessive, showing the trait associated with 'a'.

Front

In a Punnett square, what does each box represent?

Back

Each box represents a possible genotype of the offspring.