Punnett Square lesson

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13 Terms

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Genes

A region of DNA responsible for a trait

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Alleles

Different variations of the same gene

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Dominant Allele

Can hide the expression of recessive alleles

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Recessive Allele

Can be hidden by a dominant allele

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Genotype

The 2 alleles you have for a particular gene

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Phenotype

The allele you actually show

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Homozygous

Means you’ve got 2 of the same alleles for a trait

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Heterozygous

Means you’ve got 2 different alleles for a trait

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Punnett squares

A diagram that shows the probability of different offspring that can be produced by 2 parents

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Incomplete dominance

When 2 alleles blend, neither is dominant

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Codonminance

When 2 alleles both show at the same time, NOT blending

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Sex-Linked

On the X-chromosome

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Polygenic

Controlled by 2 or more genes with several alleles each