Monday, February 13, 2012

Incomplete dominance?

suppose that white carnations are INCOMPLETE dominant over red thorns are COMPLETELY dominant over smooth stemmed flowers.

A carnation with both color alleles will be pink.





Pollonate a red thornless carnation with the pollen from the anther of another that is white and pure for thorns.



Use the symbols R/r for color and T/t for thorns.



take it through the F1 phase only?



how many genotypes are there in F1?



what are the phenotypes?





thank you very much an advance!!!!

Incomplete dominance?
RR=white; Rr=pink; rr=white

T= thorns; t = thornless



Red, thornless x white, homozygous thorned

P: rrtt x RRTT

gametes from first parent: rt rt rt rt

gametes from second parent RT RT RT RT



F1: all rRtT



1. Only one genotype in the F1 because each parent only gave one type of gamete.

2. F1 is all rRtT which is pink, thorned
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