A Genetics Riddle

27 Mar

Along with his brothers, a soldier goes off to war leaving behind his wife and two sons. Six years later he returns to his family after losing both his brothers in action. Something is different though. His wife suspects something, but can’t put her finger on it. She just knows that something is different about her husband. Over the next two years, the family grows by twins (a boy and a girl) and then another girl. Then, in an auto accident, the husband dies and his widow decides that she can now investigate a hunch she has had for some time without upsetting her husband.

That month, she takes all of her children in for their annual checkup and vaccines, and also asks the doctor to check her blood type along with all of the children.

The results, mailed to her (see below) later that week, give her a start as she realizes her hunch was correct.

What was her hunch? How did she arrive at her conclusion?

Screen Shot 2016-03-27 at 3.16.30 PM.png



Posted by on March 27, 2016 in Uncategorized


Tags: , , , , ,

2 responses to “A Genetics Riddle

  1. Cloudy Media Blog

    March 29, 2016 at 7:30 pm

    Oooh, what fun! OK, so if she’s blood type O, it means that she has the OO genotype. For her to have 2 kids (A, B) with her husband, it means he would have to be AB (kids would be AO and BO). Also meaning that she could never have a child with an O phenotype! So one of his brothers returns and steals his identity? Sounds like a fascinating drama. I also love that the kids were going to get their check up and vaccines. 🙂 Keep up the great posts Jack.

    • downhousesoftware

      March 29, 2016 at 9:58 pm

      Never miss an opportunity to promote taking good care of your kids! Thanks for playing!


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