Dihybrid Crosses

Dihybrid Crosses - Dihybrid Crosses | When Mendel...

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Dihybrid Crosses | When Mendel considered two traits per cross (dihybrid , as opposed to single-trait- crosses, monohybrid ), The resulting (F2) generation did not have 3:1 dominant:recessive phenotype ratios. The two traits, if considered to inherit independently, fit into the principle of segregation . Instead of 4 possible genotypes from a monohybrid cross, dihybrid crosses have as many as 16 possible genotypes. Mendel realized the need to conduct his experiments on more complex situations. He performed experiments tracking two seed traits: shape and color. A cross concerning two traits is known as a dihybrid cross. Crosses With Two Traits Smooth seeds (S) are dominant over wrinkled (s) seeds. Yellow seed color (Y) is dominant over green (g). Again, meiosis helps us understand the behavior of alleles.
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Methods, Results, and Conclusions Mendel started with true-breeding plants that had smooth, yellow seeds and crossed them with true-breeding plants having green, wrinkled seeds. All seeds in the F1 had
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Dihybrid Crosses - Dihybrid Crosses | When Mendel...

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