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Unformatted text preview: What is a likely explanation for these results? The following scenario works: The parents are: homozygous red flowered plants: AABB homozygous white flowered plants: aabb with A dominant over a and B dominant over b red X white parents gives F1s, which are all AaBb The F1 X F1 cross is then AaBb X AaBb, which gives offspring in the ratio of 9 A-B-:3 A-bb:3 aaB-:1 aabb (remember that A-B- is a shorthand and includes all of AABB, AaBB, AABb and AaBb, and so forth for the A-bb and aaB- classes). It appears that having the dominant phenotype for both genes gives red flowers, having the recessive phenotype for both genes gives white flowers and having either gene dominant with the other recessive gives pink flowers....
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- Spring '06