Punnett Squares - Complete Dominance

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 homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, such as AA or aa.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene, such as Aa.

Front

What is the difference between dominant and recessive traits?

Back

Dominant traits are expressed when at least one dominant allele is present, while recessive traits are only expressed when two recessive alleles are present.

Front

How do you represent a homozygous dominant genotype?

Back

A homozygous dominant genotype is represented as two uppercase letters, such as AA.

Front

How do you represent a homozygous recessive genotype?

Back

A homozygous recessive genotype is represented as two lowercase letters, such as aa.

Front

What is the probability of offspring having a dominant trait if both parents are heterozygous?

Back

The probability is 75%.

Front

If a homozygous dominant plant (BB) is crossed with a homozygous recessive plant (bb), what will the genotype of the offspring be?

Back

All offspring will be heterozygous (Bb).

Front

What is the genotype of a plant that is homozygous recessive?

Back

The genotype of a homozygous recessive plant is represented as 'bb'.

Front

In a cross between two heterozygous parents (Aa x Aa), what is the chance of producing a homozygous recessive offspring?

Back

The chance is 25%.