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 homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, either dominant (e.g., TT) or recessive (e.g., tt).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Tt).

Front

What is the genotype for a homozygous recessive individual?

Back

The genotype for a homozygous recessive individual is represented as 'tt'.

Front

What is the genotype for a homozygous dominant individual?

Back

The genotype for a homozygous dominant individual is represented as 'TT'.

Front

What is the probability of producing a short plant (tt) from a Tt x Tt cross?

Back

The probability of producing a short plant (tt) from a Tt x Tt cross is 25%.

Front

What are alleles?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome.

Front

What is the phenotypic ratio of a Tt x Tt cross?

Back

The phenotypic ratio of a Tt x Tt cross is 3 tall (T) to 1 short (t).

Front

What is the significance of the dominant allele?

Back

The dominant allele is the one that expresses its trait even when only one copy is present (e.g., T in Tt).

Front

What is the significance of the recessive allele?

Back

The recessive allele only expresses its trait when two copies are present (e.g., tt).