OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The fur in a population of dogs is controlled by two alleles. Black (B) is dominant and tan (b) is recessive. If we know that one of the dog’s alleles is B and it has brown fur, what’s the second allele?
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B
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b
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The co-dominant red gene (O/o), found on the X chromosome, determines whether there will be any red variations to fur color or not. This gene encodes phaeomelanin. The dominant allele O codes for orange tones, and the recessive allele o for the non-orange pigmentation (black or brown).
Detailed explanation-2: -In mice, black fur (B) is dominant to brown fur (b) and a short tail (T) is dominant to a long tail (t). Two mice with the genotype BbTt have two separate litters of offspring together.
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