OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a species of mouse, brown fur (B) is dominant over white fur (b). If a heterozygous brown mouse is crossed with a white-colored mouse, what would be true of their possible offspring?
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100% BB
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25% BB, 25% bb, and 50% Bb
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50% Bb and 50% bb
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75% BB and 25% Bb
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Explanation:
Detailed explanation-1: -Based on the parents, the gametes and the possible offspring can be determined using a Punnett square. At the end of the process the genotypic ratio is 1 (BB) : 2(Bb) : 1(bb). The phenotypic ratio will be 3 (Black fur) : 1 (brown fur).
Detailed explanation-2: -Brown mice have the genotype BB or Bb.
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