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25 November, 18:36

If jessica has light eyes (bb) and both of her parents have dark eyes (Bb) which statementis true?

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  1. 25 November, 20:53
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    She was in the 25% of the punit square that got the light eyes. The other 75% would have been dark
  2. 25 November, 21:01
    0
    The possibilities of combinations from her parent’s gametes would be BB, inheriting a dominant trait from both parents and would occur 25% of the time, Bb, inheriting either a dominant from the maternal side OR the paternal side but not both, and because there are two ways to obtain this combination of gametes, the probability is twice that of a combination that could only occur in one way (like having BB, which was 25%, so Bb must be 50%), and lastly, bb, inheriting a recessive trait from both parents and would only occur the remaining 25% of the time. This is the group that Jessica calls into.
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