Monohybrid Cross Practice

Front

What is a monohybrid cross?

Back

A genetic cross between individuals that involves one pair of contrasting traits.

Front

Define dominant trait.

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

Define 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

What is the genotype of a homozygous individual?

Back

An individual with two identical alleles for a particular gene (e.g., AA or aa).

Front

What is the genotype of a heterozygous individual?

Back

An individual with two different alleles for a particular gene (e.g., Aa).

Front

What is a phenotype?

Back

The observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What is a Punnett square?

Back

A diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What does it mean for a trait to be codominant?

Back

In codominance, both alleles in a heterozygous individual contribute to the phenotype, resulting in a phenotype that shows both traits.

Front

What is the expected phenotype ratio in a monohybrid cross?

Back

The expected phenotype ratio is typically 3:1 for dominant to recessive traits.

Front

How do you calculate the probability of a specific genotype in offspring?

Back

By using a Punnett square to determine the ratio of the genotypes and then converting that ratio into a percentage.