In chickens, the frizzle gene “F” controls the appearance of the feathers. A homozygous dominant chicken for the frizzle gene shows “extreme frizzle”, that is his feathers are extremely disrupted. The normal chicken is homozygous recessive and has undisrupted feathers. When a chicken with extreme frizzle is mated with a normal chicken, all of the offspring exhibit mild frizzle.

Question

In chickens, the frizzle gene “F” controls the appearance of the feathers.  A homozygous dominant chicken for the frizzle gene shows “extreme frizzle”, that is his feathers are extremely disrupted.  The normal chicken is homozygous recessive and has undisrupted feathers.  When a chicken with extreme frizzle is mated with a normal chicken, all of the offspring exhibit mild frizzle.

anonymous · Answer

a.	Is the mode of inheritance incomplete dominance or co-dominance? Why?
b.	What would you expect to see if the mode of inheritance was the other alternative in part (a)?
c.	Show the expected phenotypic and genotypic ratios if two chickens with mild frizzle are mated.

anonymous · Answer

a.	Is the mode of inheritance incomplete dominance or co-dominance? Why?
b.	What would you expect to see if the mode of inheritance was the other alternative in part (a)?
c.	Show the expected phenotypic and genotypic ratios if two chickens with mild frizzle are mated.

anonymous · Answer

I believe the mode of inheritance is co-dominance because both alleles are expressed at the same time..

anonymous · Answer

Are there some normal feathers and some frizzled?  THAT would be co-dominance.  Since there is a third phenotype, I think  it must be incomplete dom.

anonymous · Answer

but it's just weird on my Punntt Square.. :

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