Punnett Squares - Challenge yourself?

Front

What is a Punnett Square?

Back

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

Front

What does it mean for a trait to be dominant?

Back

A dominant trait is one that will appear in the offspring if at least one parent contributes a dominant allele.

Front

What does it mean for a trait to be recessive?

Back

A recessive trait is one that will only appear in the offspring if both parents contribute a recessive allele.

Front

What is the genotype of a heterozygous individual?

Back

A heterozygous individual has two different alleles for a trait, represented as 'Dd'.

Front

What is the genotype of a homozygous dominant individual?

Back

A homozygous dominant individual has two identical dominant alleles, represented as 'DD'.

Front

What is the genotype of a homozygous recessive individual?

Back

A homozygous recessive individual has two identical recessive alleles, represented as 'dd'.

Front

If both parents are heterozygous (Dd), what is the probability of having a homozygous recessive offspring?

Back

The probability is 25%.

Front

If brown hair (B) is dominant over blond hair (b), what is the probability of offspring having blond hair from two heterozygous parents (Bb)?

Back

The probability is 25%.

Front

What is the probability of offspring having at least one dominant trait from two heterozygous parents (Dd)?

Back

The probability is 75%.

Front

In a cross between Bb (black fur) and bb (white fur), what is the probability of heterozygous offspring?

Back

The probability is 50%.