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    Hi, could someone help me with this. Part I.)
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    The mark scheme says this

    Attachment 594628594630

    The mark scheme says for individual 6: X^B X^b Hh
    But it says that the phenotype is "white streak and normal vision"
    wouldn't the correct answer be X^B X ^(b/B) H- (the dash being either H or h)
    The phenotype a describe could be homozygous dominant individual for both traits or a heterozygous individual. Am I correct in thinking that? Why does the mark scheme just show the heterozygous genotype?
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    • Thread Starter

    Why is no one answering this question? Is there something I'm missing...
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