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lizzybug956

If a baby boy inherits a recessive allele from his mother, in which of the following circumstances would he most likely exhibit that recessive trait? The allele is X-linked. His mother’s father also exhibited the trait. The allele skips a generation. He inherited the dominant trait from his father.

  • one year ago
  • one year ago

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  1. lizzybug956
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    I Was Thinking D ?

    • one year ago
  2. duneybear
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    I'm not sure about this one..Maybe B? Not entirely sure though.

    • one year ago
  3. lizzybug956
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    Alright Thanks .... I Was Deciding NOW between B & A ?

    • one year ago
  4. duneybear
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    Hm...not sure.

    • one year ago
  5. lizzybug956
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    Alright Thnxx

    • one year ago
  6. duneybear
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    I'd say B ...just a guess I guess

    • one year ago
  7. sasogeek
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    females are y and males are x... right?

    • one year ago
  8. duneybear
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    Females are yy or something and males are xy

    • one year ago
  9. sasogeek
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    then i suppose it's A. if the allele is X-linked, then there will be two recessives. one on the Y and it's link on the X. two recessives will always exhibit the trait in question

    • one year ago
  10. duneybear
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    Hm...That sounds about right :). Thanks for correcting that!

    • one year ago
  11. lizzybug956
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    Okay Thnx (: Both Yall ! (:

    • one year ago
  12. blues
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    OK. Males are XY and females are XX. If the baby is a boy, it means he inherited the Y from his dad. He could have got either of his Mom's two X chromosomes. It means that even if the allele on the X is recessive the baby boy will express it because the Y does not have any alleles on it, dominant or otherwise.

    • one year ago
  13. sasogeek
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    so i guess my explanation was somewhat wrong but the answer was right?

    • one year ago
  14. blues
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    "Wrong" is not a word we use on OpenStudy, Saso, but yeah. Pretty much. :/ You and your luck with genetics problems. Like finding that solution to my challenge back in January that I didn't think of when I came up with it.

    • one year ago
  15. blues
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    Process of elimination is pretty efficient on this one, rather than trying to logic it out by brute force. It says the allele from Mom is recessive. If the boy got a dominant allele for the same gene from Dad, the recessive allele would definitely NOT be expressed. So it cannot be D. The allele cannot skip a generation and be expressed in at the same time. So it cannot be C. His mother's father probably did exhibit the trait. But that gives no info on whether it is dominant or recessive, so it's not B. A is the only one left standing.

    • one year ago
  16. sasogeek
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    brute force lol. funny as always.

    • one year ago
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