Friday, February 5, 2010

Classical Genetics

Want to learn more about genetics? Did you know that children resemble their parents? That genes come in pairs? Click here to learn more.

Be sure to click on the links of the right as well as concept, animation, and gallery links on the bottom of the page.

Enjoy!

18 comments:

  1. This is so cool. I just love science. This is really helpful for reviews or if you forgot something.Thanks Leslie!

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  2. I've always wondered about genes. Thanks for posting this, Leslie.
    My mom has black hair and my dad had blond hair, but I have brown hair. Why is that? Why don't I have either my mom's hair color or my dad's?
    Caitlyn 7H

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  3. i cant wait till we start genetics
    it's so interesting

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  4. The Animation with Gregor mendel was really good! it showed how he started cross fertilization. Wasn't there a time when the Dutch went crazy with this, and sold rare mixes of tulips for millions of dollars? I was just wondering... 1st of all, why does a flower have both male and female sex parts? or is that only for some flowers??? also, why does the pistil mature after the stamen? Overall, DNA from the beginning was very interesting. Thanks!

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  5. Thanks so much! This website was really helpful and interesting!

    :D

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  6. Wow, this is a really helpful link to genes and heredity. As we go further and further along into genes and heredity, I can look at the topics that were introduced to get a better understanding, since there are so many topics!
    Thanks Leslie!

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  7. This is preety cool, it's interesting how genetics play a major a role in how a child acts or looks. But why do children sometimes don't look like thier parents at all?
    -Rachel

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  8. that guy in the picture is gregor mendel right? didnt he cross two different types of pea plants with one of their pollen into the other plant with a paint brush?....why a paint brush?

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  9. Fia: I'm pretty sure that all plants have "female" and "male" parts. And the pistil and the stamen mature at pretty much the same time. In the animation it didn't show it but I think that the pistils were cut off first and then a while later after the stamen matured when the pollen fertilized it by being brushed onto it. Hopefully, that helps...

    Rachel: There can be mixed recessive genes. For example: I don't really know but the REAL dominant recessive but lets put it this way :
    Two parents. One dark skinned and one light.
    Let's say that Dark skin is dominant. One parent (dark skinned) is Dd for a hybrid (heterozygous) of dark and light skinned. D stands for dark skin color allele and d stands for the light skin color allele. Since it's mixed, dark, which in this scenario is dominant, shows up instead of light. The other parent whom is light skin colored has the gene dd, which is a pure (homozygous) light skin, light skin. When mixed in a punnett square, the four outcomes possible are Dd, Dd, dd, and dd. If the combo dd is chosen for the child, the child will have light colored skin rather than dark like its parent. If it's a mix of Dd and Dd for parents, outcomes are Dd, Dd, DD, and dd. THe parents can be dark skinned but the child can be light skinned (dd)

    Radhika: It's just an animation. It could have been any brush or just rubbing the flower heads together. And yes, it is Mendel.

    Michael N. 7I

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  10. How come Mendel's mouth doesn't move if its an animation? Anyway The squiggly things look more like a seashell than peas.

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  11. I thought the animation about cross-pollination was really helpful, and it helped me understand exactly what Mendel did.

    Julia G. ~ 7F

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  12. I understand a bit better now. Good website..

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  13. Caitlyn: Maybe your hair color is a mix? You know, something like black + blonde = brown?

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  14. Can the environment affect the gene? (before the baby is born)

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  15. This is very interesting, im actually excited about learning about genetics. But I'm still a little confused about like if your mom has blonde hair and your dad has brown hair and your end up with red hair. How does that happen? But like no one in your whole famile has red hair.

    Maggie 7f

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  16. I have hazel eyes and my dad has green eyes my mom has dark brown eyes and both of my sisters have blue eyes and all my relatives have green or dark brown eyes. So does this gene come out of nowhere?

    Sophia m 7f

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  17. Sophia, someone in your family must have had hazel eyes. I'm not sure if hazel eye color is a dominant or recessive allele though.

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  18. I think it to be quite interesting to be able to have traits farther back in your family; you don't have to have genes from your parents directly, but someone else closely related to you.

    Erin Flynn 7H

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