Intro to Genetics

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

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What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene (e.g., RR or rr).

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene (e.g., Rr).

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What is a dominant allele?

Back

A dominant allele is an allele that expresses its trait even when only one copy is present in the genotype.

Front

What is a recessive allele?

Back

A recessive allele is an allele that only expresses its trait when two copies are present in the genotype.

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What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the phenotype?

Back

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

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What is the difference between genotype and phenotype?

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Genotype refers to the genetic makeup, while phenotype refers to the physical expression of that genetic makeup.

Front

What does it mean if an organism is homozygous dominant?

Back

An organism is homozygous dominant if it has two dominant alleles for a trait (e.g., RR).

Front

What does it mean if an organism is homozygous recessive?

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An organism is homozygous recessive if it has two recessive alleles for a trait (e.g., rr).