Monohybrid and Dihybrid Crosses

Front

What is a monohybrid cross?

Back

A genetic cross between individuals that differ in one trait, typically involving one pair of contrasting traits.

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What is a dihybrid cross?

Back

A genetic cross between individuals that differ in two traits, typically involving two pairs of contrasting traits.

Front

Define genotype.

Back

The genetic makeup of an organism, represented by the alleles it possesses.

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Define phenotype.

Back

The observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What does homozygous mean?

Back

An organism is homozygous for a trait when it has two identical alleles for that trait.

Front

What does heterozygous mean?

Back

An organism is heterozygous for a trait when it has two different alleles for that trait.

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What is the Law of Segregation?

Back

The principle that during the formation of gametes, the two alleles for a trait separate from each other.

Front

What is the Law of Independent Assortment?

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The principle that different traits are inherited independently of each other.

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What is a Punnett square?

Back

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

Front

What is a dominant allele?

Back

An allele that expresses its phenotype even in the presence of a recessive allele.