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You are a geneticist studying a mutation that results in dwarfism in a particular species of fish. You wish to determine whether the mutation is dominant or recessive, so you carry out several crosses with animals captured in the wild: Parent Phenotypes Progeny Phenotypes Cross #1 dwarf X dwarf 41 dwarf, 9 normal Cross #2 dwarf X normal 24 dwarf, 26 normal Cross #3 dwarf X normal 23 dwarf, 27 normala.Based on these results, is the dwarf mutation dominant, or recessive? What data led to that conclusion?

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Answer:

Based on the cross #1, it is plainly demonstrating that the smaller person is predominant phenotype where as ordinary is recessive phenotype.  

Since the predominant allele can communicate her character in both homo and heterozygous conditions, where as the recessive allele can communicate her character just in homozygous in condition as it were. As the nearness of normal posterity from predominate guardians it is plainly demonstrating that the smaller person is prevailing phenotype.

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