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foreverAJ

  • one year ago

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

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

  2. foreverAJ
    • one year ago
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    im lost .

  3. tafkas77
    • one year ago
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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?

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

  5. tafkas77
    • one year ago
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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?

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

  7. tafkas77
    • one year ago
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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)

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

  9. foreverAJ
    • one year ago
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    crossing over ?

  10. tafkas77
    • one year ago
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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!

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

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

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

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

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