Punnett Square Practice

Front

What is a Punnett Square used for?

Back

A Punnett Square is used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

Define homozygous dominant.

Back

Homozygous dominant refers to an organism that has two identical dominant alleles for a trait (e.g., AA).

Front

What does heterozygous mean?

Back

Heterozygous means having two different alleles for a particular gene (e.g., Aa).

Front

What is the phenotype of a homozygous dominant brown mouse?

Back

The phenotype of a homozygous dominant brown mouse is brown.

Front

What is the phenotype of a heterozygous brown mouse?

Back

The phenotype of a heterozygous brown mouse is also brown, as brown is dominant over tan.

Front

What is the expected genotype ratio from a cross between a homozygous dominant and a heterozygous individual?

Back

The expected genotype ratio is 1 homozygous dominant (AA) to 1 heterozygous (Aa).

Front

What does the term 'genotype' refer to?

Back

Genotype refers to the genetic makeup of an organism, specifically the alleles it possesses.

Front

What is the difference between genotype and phenotype?

Back

Genotype is the genetic constitution of an organism, while phenotype is the observable physical or biochemical characteristics.

Front

What does the notation 'tt' represent in genetics?

Back

The notation 'tt' represents a homozygous recessive genotype.

Front

What is the expected phenotype ratio from a cross between two heterozygous individuals (Aa x Aa)?

Back

The expected phenotype ratio is 3 dominant (tall) to 1 recessive (short).