A cross between pure-breeding chicken lines with rose combs and pea combs produces offspring all having a new phenotype, walnut comb. If two walnut comb chickens are mated, the offspring will have the following phenotypes: walnut comb, rose comb, pea comb, and a new phenotype called single comb. Which of the following statements best explains this result? (Figure 13.9)

+1 vote

 

  

The alleles of two genes are interacting to produce the different phenotypes.

  

The alleles of a single gene are interacting to produce the different phenotypes.

  

The phenotypes are the result of incomplete dominance.

  

The phenotypes are the result of codominance.

 

asked Dec 27, 2012 in Biology by anonymous
    

1 Answer

+1 vote

 

The alleles of two genes are interacting to produce the different phenotypes.

 

answered Dec 27, 2012 by BeatKick ~Rookie~ (266 points)

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