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foreverAJ Group Title

Carol and Joseph have freckles and curly red hair. All of their children, except one, also have freckles and curly red hair. Their son, Sam, has the same curly red hair but not one freckle! How can a child get a chromosome that is totally different from the original chromosomes of both parents? A) gene flow B) genetic drift C) crossing over D) natural selection

  • one year ago
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  1. tafkas77 Group Title
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    Hi there! DO you understand this question at all or are you completely lost?

    • one year ago
  2. foreverAJ Group Title
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    im lost .

    • one year ago
  3. tafkas77 Group Title
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    That's perfectly fine. Genetics is a topic that confuses a lot of people, hee hee. Fortunately I can help you with this! :D To start, you need to have an understanding of what each of those terms mean. Are you familiar with any of them, or would you like me to explain them with a short definition?

    • one year ago
  4. foreverAJ Group Title
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    I'm Familiar with the term.

    • one year ago
  5. tafkas77 Group Title
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    Okay, good. :) So let's start eliminating some of the nonsense answers. Option A is a nonsense answer, because gene flow has to do with entire populations, not just parents passing genes down to their kids. :) Do you see any others that can be eliminated?

    • one year ago
  6. foreverAJ Group Title
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    I agree & i would say we can eliminate D too , right?

    • one year ago
  7. tafkas77 Group Title
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    Excellent! :D Natural selection is really only talking about traits that help organisms survive (survival of the fittest). Similarly, we can get rid of one more... which one do you think that is? (Hint: it has something to do with mutations)

    • one year ago
  8. tafkas77 Group Title
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    Or, rather, it can CAUSE mutations. :)

    • one year ago
  9. foreverAJ Group Title
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    crossing over ?

    • one year ago
  10. tafkas77 Group Title
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    Well; that would be a good guess, because it has a hand in causing mutations sometimes. But actually, genetic drift causes mutations, or variance, in the genes of populations, which basically feeds into natural selection. Perhaps I should have made myself more clear - sorry about that!

    • one year ago
  11. foreverAJ Group Title
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    so crossing over is the correct answer of this question ?

    • one year ago
  12. tafkas77 Group Title
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    Yes, it is! Do you understand this better, now? :)

    • one year ago
  13. foreverAJ Group Title
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    yes , thank you so much! you explained better than my own teacher did! thanks again.

    • one year ago
  14. tafkas77 Group Title
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    Wow, thank you for the compliment (and the testimonial)!. I try my best! You are very welcome. :)

    • one year ago
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