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 are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by the combination of alleles (e.g., TT, Tt, tt).

Front

What are phenotypes?

Back

Phenotypes are the observable traits or characteristics of an organism, determined by its genotype (e.g., brown hair, blond hair).

Front

What does 'TT' represent in genetics?

Back

'TT' represents a homozygous dominant genotype, meaning both alleles are dominant.

Front

What does 'tt' represent in genetics?

Back

'tt' represents a homozygous recessive genotype, meaning both alleles are recessive.

Front

What does 'Tt' represent in genetics?

Back

'Tt' represents a heterozygous genotype, meaning one allele is dominant and the other is recessive.

Front

How do you calculate the percentage of genotypes in a Punnett Square?

Back

Count the occurrences of each genotype in the Punnett Square and divide by the total number of squares, then multiply by 100.

Front

What is the phenotype ratio for a cross between TT and tt?

Back

The phenotype ratio is 100% tall (dominant trait) offspring.

Front

What is the phenotype ratio for a cross between Tt and Tt?

Back

The phenotype ratio is 75% tall and 25% short.

Front

What is the purpose of using a Punnett Square?

Back

The purpose is to visualize and predict the genetic outcomes of a cross between two organisms.