Mendelian and Non-Mendelian Genetics

Front

What are multiple alleles (polygenic traits)?

Back

Traits controlled by more than two alleles, resulting in a range of phenotypes. Examples include height and skin color.

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What is co-dominance?

Back

A type of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits. Example: checkered chickens from black and white parents.

Front

What is the phenotype?

Back

The physical appearance of an organism, determined by its genotype.

Front

What does BB represent in genetics?

Back

A homozygous dominant genotype that would express the dominant trait, such as blonde hair.

Front

What is incomplete dominance?

Back

A type of inheritance where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes. Example: red and white flowers producing pink flowers.

Front

What is a genotype?

Back

The genetic makeup of an organism, represented by alleles (e.g., BB, Bb, bb).

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What is the difference between dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in a heterozygote. Example: B (blonde) is dominant over b (brown).

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What is epistasis?

Back

A genetic interaction where one gene masks or suppresses the expression of another gene.

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What are environmental traits?

Back

Traits influenced by environmental factors rather than genetic makeup, such as height influenced by nutrition.

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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.