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CODOMINANCE &
INCOMPLETE DOMINANCE
CODOMINANCE & INCOMPLETE DOMINANCE

 Cow colour comes from alleles that are codominant…



  “red”            “white”                “roan”

              +
    CR                 C W                 CRCW
CODOMINANCE & INCOMPLETE DOMINANCE
   What are the genotypes and phenotypes of the
                  following cows?




  CWCW               CRCR               CRCW
CODOMINANCE & INCOMPLETE DOMINANCE
  What would happen if you mate the following cows?




         CRCR           x          CRCW
CODOMINANCE & INCOMPLETE DOMINANCE
  What would happen if you mate the following cows?




                       C R
                                C W       F1 Genotypes:
                                           1 CRCR : 1 CRCW
                      CRCR     CRCW
             CR                       z   F1 Phenotypes:
                                          1 red : 1 roan
                      CRCR     CRCW
             CR
CODOMINANCE & INCOMPLETE DOMINANCE
  What would happen if you mate the following cows?




                       C W
                                C W       F1 Genotypes:
                                              All CRCW
                      CRCW     CRCW
             CR                       z   F1 Phenotypes:
                                            All 1 roan
                      CRCW     CRCW
             CR
CODOMINANCE & INCOMPLETE DOMINANCE

  Snapdragon flower colour comes from alleles that are
                incompletely dominant…


  “red”            “white”                 “pink”

              +
    F                  F’                     FF’
CODOMINANCE & INCOMPLETE DOMINANCE
   What are the genotypes and phenotypes of the
           following snapdragon flowers?




    FF                F’F’               FF’
CODOMINANCE & INCOMPLETE DOMINANCE
 What would happen if you cross the following flowers?



      Mon
     cherie!




                                      My, what soft
                                       petals you
                                          have!
               FF              F’F’
CODOMINANCE & INCOMPLETE DOMINANCE
 What would happen if you cross the following flowers?




                        F’       F’         F1 Genotypes:
                                                All FF’
                        FF’       FF’
               F                        z   F1 Phenotypes:
                                               All pink
                        FF’       FF’
               F

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02 codominance incomplete dominance

  • 2. CODOMINANCE & INCOMPLETE DOMINANCE Cow colour comes from alleles that are codominant… “red” “white” “roan” + CR C W CRCW
  • 3. CODOMINANCE & INCOMPLETE DOMINANCE What are the genotypes and phenotypes of the following cows? CWCW CRCR CRCW
  • 4. CODOMINANCE & INCOMPLETE DOMINANCE What would happen if you mate the following cows? CRCR x CRCW
  • 5. CODOMINANCE & INCOMPLETE DOMINANCE What would happen if you mate the following cows? C R C W F1 Genotypes: 1 CRCR : 1 CRCW CRCR CRCW CR z F1 Phenotypes: 1 red : 1 roan CRCR CRCW CR
  • 6. CODOMINANCE & INCOMPLETE DOMINANCE What would happen if you mate the following cows? C W C W F1 Genotypes: All CRCW CRCW CRCW CR z F1 Phenotypes: All 1 roan CRCW CRCW CR
  • 7. CODOMINANCE & INCOMPLETE DOMINANCE Snapdragon flower colour comes from alleles that are incompletely dominant… “red” “white” “pink” + F F’ FF’
  • 8. CODOMINANCE & INCOMPLETE DOMINANCE What are the genotypes and phenotypes of the following snapdragon flowers? FF F’F’ FF’
  • 9. CODOMINANCE & INCOMPLETE DOMINANCE What would happen if you cross the following flowers? Mon cherie! My, what soft petals you have! FF F’F’
  • 10. CODOMINANCE & INCOMPLETE DOMINANCE What would happen if you cross the following flowers? F’ F’ F1 Genotypes: All FF’ FF’ FF’ F z F1 Phenotypes: All pink FF’ FF’ F