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 genotype mean?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses for a particular trait.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait (e.g., BB or bb), while heterozygous means having two different alleles (e.g., Bb).

Front

What is a phenotype?

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What does it mean if an organism is homozygous dominant?

Back

An organism is homozygous dominant if it has two dominant alleles for a trait (e.g., PP).

Front

What does it mean if an organism is homozygous recessive?

Back

An organism is homozygous recessive if it has two recessive alleles for a trait (e.g., pp).

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 expected genotype ratio from a monohybrid cross?

Back

The expected genotype ratio from a monohybrid cross is typically 1:2:1 (e.g., 1 homozygous dominant : 2 heterozygous : 1 homozygous recessive).

Front

What is the expected phenotype ratio from a monohybrid cross?

Back

The expected phenotype ratio from a monohybrid cross is typically 3:1 (e.g., 3 dominant phenotype : 1 recessive phenotype).

Front

What is a test cross?

Back

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