Concept explainers
An experienced goldfish breeder receives two unusual male goldfish. One is black rather than gold, and the other has a single tail fin rather than a split tail fin. The breeder crosses the black male to a female that is gold. All the
Black male
Gold 32
Black 34
Single-finned male
Split fin 41
Single fin 39
a. What do the results of these crosses suggest about the inheritance of color and tail fin shape in goldfish?
b. Is black color dominant or recessive? Explain. Is single tail dominant or recessive? Explain.
c. Use chi-square analysis to test your hereditary hypothesis for each trait.
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