Punnett Square Practice

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 the term 'allele' mean?

Back

An allele is a variant form of a gene that can produce different traits.

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

What is the genotype for a homozygous dominant individual?

Back

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

Front

What is the genotype for a homozygous recessive individual?

Back

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

Front

What does 'heterozygous' mean?

Back

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

Front

How do you determine the probability of an offspring having a dominant trait using a Punnett Square?

Back

You count the number of squares showing the dominant trait and divide by the total number of squares.

Front

If a plant has the genotype 'Pp', what are the possible phenotypes?

Back

The possible phenotypes are purple (dominant) and white (recessive).

Front

What is the expected phenotypic ratio from a monohybrid cross?

Back

The expected phenotypic ratio from a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What is a test cross?

Back

A test cross is a breeding experiment used to determine the genotype of an individual with a dominant phenotype by crossing it with a homozygous recessive individual.