Genetic Ratios

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A and B have distinct traits, A overrules B, aabb lacks trait

12:3:1

Either A or B required, aabb the only non-trait

15:1

AaBb x aabb

1:1:1:1 genotypic ratio

AaBb x aabb

1:1:1:1 phenotypic ratio

A_ and aa produce dom/rec, but only if B is present. bb produces different phenotype

9:3:4

Either A or B required, but have different form when together

9:6:1

both A and B required

9:7

1:2:1

Aa x Aa - genotypic ratio

3:1

Aa x Aa - phenotypic ratio

1:1

Aa x aa - genotypic ratio

1:1

Aa x aa - phenotypic ratio

9:3:3:1

AaBb x AaBb phenotypic ratio

1:2:4:2:1:2:1:2:1

AaBb x AaBb, genotypic ratio

12:3:1

Epistasis phenotypic ratio: AaBb x AaBb -A and B produce distinct traits, A overrules B, aabb lacks either triat.

9:3:4

Epistasis phenotypic ratio: AaBb x AaBb -A_ and aa produce distinctive dom/rec trait, but only if B is present. There is a different phenotype if bb is present.

9:6:1

Epistasis phenotypic ratio: AaBb x AaBb -either A or B is sufficient to produce one form of trait, but differs form when together.

15:1

Epistasis phenotypic ratio: AaBb x AaBb -either A or B is sufficient to produce trait (only aabb lacks)

9:7

Epistasis phenotypic ratio: AaBb x AaBb -if both A and B are required for expression

Aa x aa

Genotypic 1:1 ratio, simple mendelian. What are the parents?

Both heterozygotes (Aa x Aa)

Genotypic 1:2:1 ratio, simple mendelian. What are the parents?

AaBb x AaBb

Genotypic 1:2:4:2:1:2:1:2:1 ratio

Aa x aa

Phenotypic 1:1 ratio, simple mendelian. What are the parents?

Both heterozygotes (Aa x Aa)

Phenotypic 3:1 ratio, simple mendelian. What are the parents?

AaBb x AaBb

Phenotypic 9:3:3:1

1:1:1:1

genotypic ratio of AaBb x aabb

1:1:1:1

phenotypic ratio of AaBb x aabb


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