A breeder has a black rabbit. To determine the rabbit's genotype, the breeder does a test cross with a brown rabbit. All six of the offspring turn out black. Can the breeder be certain about the genotype of the black rabbit? Explain why or why not in terms of probabilities.Question about genotypes and probability of a black %26amp; brown rabbit, and their offspring!?
IF the black rabbit is heterozygous you would expect each offspring to have a 50% chance of being black or brown. The probability of getting 6 black rabbits from that cross would be (1/2)^6 or 1/64 or 0.015
While a 1.5% chance of an outcome is low, it's not impossible to get. So, he cannot be certain that the black rabbit is homozygous for the black allele. However, if he does another test cross and gets the same result, he could be more certain...
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