Punnet Squares

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genotypes of a particular cross or breeding experiment.

Front

What does the term 'dominant trait' mean?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait?

Back

A recessive trait is a genetic trait that is only expressed in the phenotype when two copies of the allele are present.

Front

Define phenotype.

Back

Phenotype refers to the observable physical characteristics of an organism, determined by its genotype.

Front

What is a genotype?

Back

Genotype is the genetic makeup of an organism, consisting of the alleles inherited from its parents.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

How do you calculate the percentage of offspring with a specific trait using a Punnett square?

Back

To calculate the percentage of offspring with a specific trait, count the number of squares representing that trait and divide by the total number of squares, then multiply by 100.

Front

What is the expected phenotypic ratio for a monohybrid cross?

Back

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

Front

What is the expected genotypic ratio for a monohybrid cross?

Back

The expected genotypic ratio for a monohybrid cross is typically 1:2:1 for homozygous dominant, heterozygous, and homozygous recessive genotypes.