To fill in the missing allele combinations for each individual based on the given information, we can look at the inheritance patterns for brown (B) and blonde (b) hair.
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Father’s Mother (brown hair): She has the genotype Bb (heterozygous), which is indicated.
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Father’s Father (brown hair): Since the father has brown hair and his mother is Bb, he must also be either BB or Bb. However, since a blonde child (bb) was produced, the father must also carry the blonde allele. Thus, Father’s Father must be Bb.
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Mother’s Mother (brown hair): The genotype is given as BB (homozygous dominant).
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Mother’s Father (blonde hair): This individual must be bb (homozygous recessive), which aligns with him having blonde hair.
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Father (brown hair): The father must be Bb because he has a blonde child (bb), indicating he carries a recessive allele.
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Mother (brown hair): As indicated, her genotype is Bb (heterozygous).
So, matching each person with the correct allele combination:
- Father’s Mother: Bb
- Father’s Father: Bb (inferred)
- Mother’s Mother: BB
- Mother’s Father: bb
- Father: Bb
- Mother: Bb
In summary, the matches are:
- Mother’s Father: bb
- Father: Bb
- Father’s Father: Bb