{"appState":{"pageLoadApiCallsStatus":true},"articleState":{"article":{"headers":{"creationTime":"2016-03-26T21:38:19+00:00","modifiedTime":"2016-03-26T21:38:19+00:00","timestamp":"2022-09-14T18:10:12+00:00"},"data":{"breadcrumbs":[{"name":"Academics & The Arts","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33662"},"slug":"academics-the-arts","categoryId":33662},{"name":"Science","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33756"},"slug":"science","categoryId":33756},{"name":"Genetics","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33765"},"slug":"genetics","categoryId":33765}],"title":"Uncover Inheritance Based on Genotype and Phenotype Ratios","strippedTitle":"uncover inheritance based on genotype and phenotype ratios","slug":"uncover-inheritance-based-on-genotype-and-phenotype-ratios","canonicalUrl":"","seo":{"metaDescription":"When solving genetics problems, it pays to know what patterns to look for. 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Uncover Inheritance Based on Genotype and Phenotype Ratios

By: Tara Rodden Robinson and

Updated: 03-26-2016

Genetics For Dummies

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When solving genetics problems, it pays to know what patterns to look for. The parent genotypes and offspring phenotypic ratios in this table can help you figure out what kind of inheritance is at work.

Parent Genotypes	Offspring Phenotypic Ratio	Type of Inheritance
Aa x Aa	3 A_ : 1 aa	Simple dominance, monohybrid cross
Aa x Aa	1 AA : 2 Aa : 1 aa	Incomplete dominance
AaBb x AaBb	9 A_B_ : 3 A_bb : 3 aaB_ : 1 aabb	Dihybrid cross
AaBb x AaBb	9 A_B_ : 3 A_bb : 4 aaB_ : aabb	Recessive epistasis
AaBb x AaBb	12 A_B_ : A_bb : 3 aaBb : 1 aabb	Dominant epistasis

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Uncover Inheritance Based on Genotype and Phenotype Ratios

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