Genetics vocabulary

Front

What is homozygous dominant?

Back

An organism with two identical dominant alleles for a trait, represented as 'AA'.

Front

What is phenotype?

Back

The observable physical appearance or characteristics of an organism.

Front

What is heterozygous?

Back

An organism that has two different alleles for a trait, represented as 'Aa'.

Front

What is homozygous?

Back

An organism that has two identical alleles for a trait, either dominant or recessive.

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What is the difference between genotype and phenotype?

Back

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

Front

What is a dominant allele?

Back

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

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present (homozygous recessive).

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What does codominance mean?

Back

A genetic scenario where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.

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What is incomplete dominance?

Back

A genetic situation where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

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What is a pedigree?

Back

A diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.