How would you determine whether the curl allele is dominant or recessive how would you obtain true breeding curl cats how could you be sure they are true breeding?

      For you to discover if the curl allele is dominant or recessive you can analyze the whole population, and for that, you'll need to grab a control population, and this will be your pattern.

Explanation:

      After stablishing this pattern, you'll analyze if the allele is dominant or recessive according to the quantity of organisms with that characteristic. If the allele is recessive, you'll need two full allele recessive to obtain only breeding curl cats, with this, you can be sure that they are true breeding, because both of them need both alleles (aa x aa), to express the curl fenotype.