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  1. #1
    Registered User aureptiles's Avatar
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    Smile Please Check my HW

    Hi guys,

    I'm slowly getting the hang of genetics and punnett squares. I'm a little confused about the coding though.

    For example, this is one of the practice problems I was working on: Bumble bee + Bumble bee. (s=spider, n=noprmal, p=pastel)

    -------sp------sn------pn------nn

    sp----spsp----spsn----sppn----spnn

    sn----snsp----snsn----snpn----snnn

    pn----pnsp----pnsn----pnpn----pnnn

    nn----nnsp----nnsn----nnpn----nnnn

    Here's my intepretation of the codes:
    spsp = Bumble(homo spider)?
    snsp = bumble bee?
    pnsp = bumble bee?
    snsn = spider
    nnsp = bumble bee?
    snnn = normal het spider
    pnpn = pastel
    pnnn = normal het pastel
    nnnn = normal

    The ones marked with question marks are the ones i'm not certain of.

    Does the order of the letters matter? eg. spsp = bumble, but sspp = killer

    Thanks for your help
    Last edited by aureptiles; 03-21-2009 at 03:46 PM.

  2. #2
    BPnet Veteran Bleepr's Avatar
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    Re: Please Check my HW

    Close, you are getting it. However, the morphs you have (Pastel + Spider) are co-dominant morphs meaning they have no "het" form, they either present myself or they don't. As far as I know, a there is no super spider.

    A Bumble x Bumble will get you:
    25% Normals
    25% Pastel
    25% Spiders
    25% Bumble Bees

  3. #3
    BPnet Veteran Corvid's Avatar
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    Re: Please Check my HW

    As of now there is no "Super" Spider, but It is possible if you breed a bumble bee x bumble bee that you could get homozygous spiders. Meaning it would look like like any other spider, but when bred to a normal you would get 100% (heterozygous) spiders. Spider is dominant, meaning there is no "super" form, homos and hets look the same.
    I have also heard that the homo spider may be lethal and the snakes do not survive, but I have no experience with that.

    You square is spot on, but your interpretation is a little off.
    whenever you see one p or 1 s, you have either a spider or a pastel.
    When you see 2 p's that's a super pastel, so you can create Super Pastels (pnpn) and Super Pastel Spiders (spnp or spsp)

    Regular bumble bee would be (spsn or snpn)

    Hope this helps!
    "I don't want to make money, I just want to be wonderful." ~Marilyn Monroe

  4. #4
    BPnet Veteran Bleepr's Avatar
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    Re: Please Check my HW

    My bad. I gave you the Bumbe X Normal odds.

    But yes, Corvid is right. Your square is correct, but you do need to upper or lower case the letters so that you can understand which are the represented morph. IE a Bumble is SnPn meaning that its a shows both pastel and spider genes.

  5. #5
    Registered User aureptiles's Avatar
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    Re: Please Check my HW

    Thank you guys, didn't know killer bees are possible in this combination. I thought the only way was to make a superpastel first, then breed it with a spider.

  6. #6
    Registered User aureptiles's Avatar
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    Re: Please Check my HW

    here're my new answers

    spsp = killer
    snsp = bumble
    pnsp = Killer
    snsn = spider
    nnsp = bumble
    snnn = Spider
    pnpn = Super Pastel
    pnnn = Pastel
    nnnn = normal

  7. #7
    BPnet Lifer mainbutter's Avatar
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    Re: Please Check my HW

    Quote Originally Posted by Bleepr View Post
    Close, you are getting it. However, the morphs you have (Pastel + Spider) are co-dominant morphs meaning they have no "het" form, they either present myself or they don't. As far as I know, a there is no super spider.

    A Bumble x Bumble will get you:
    25% Normals
    25% Pastel
    25% Spiders
    25% Bumble Bees
    Am I the only one who has serious issues with people saying that there is no such thing as heterozygous pastel(or any other dom/co-dom gene)?

    I realize it's all semantics, but "regular pastels" ARE heterozygous pastels.

  8. #8
    BPnet Veteran Corvid's Avatar
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    Re: Please Check my HW

    Quote Originally Posted by mmca View Post
    here're my new answers

    spsp = killer
    snsp = bumble
    pnsp = Killer
    snsn = spider
    nnsp = bumble
    snnn = Spider
    pnpn = Super Pastel
    pnnn = Pastel
    nnnn = normal
    Much better!
    If you breed a spider x super pastel you get
    50% Bumble bees
    50% Pastels

    UNLESS you happen to have one of those homo spiders, then you get 100% bumbles!
    "I don't want to make money, I just want to be wonderful." ~Marilyn Monroe

  9. #9
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    Re: Please Check my HW

    Quote Originally Posted by mainbutter View Post
    Am I the only one who has serious issues with people saying that there is no such thing as heterozygous pastel(or any other dom/co-dom gene)?

    I realize it's all semantics, but "regular pastels" ARE heterozygous pastels.
    I'm with you on this. I think that realizing that pastels and spiders are hets makes it much easier to predict offspring from complex crosses.

    Also, I'm not sure what the latest official notation is but I like the upper and lower case letters to show that there are two different "normal" genes involved in this cross; normal for pastel and normal for spider. I would write bumblebee X bumblebee as PpSs X PpSs with the P being the pastel mutant version and p the normal for pastel version and likewise S the spider mutant and s the normal for spider.

    I don't think this forum supports html tables but just in case this is how I would write the cross:


    <html><table border=2><tr><td></td><td>PS</td><td>Ps</td><td>pS</td><td>ps</td>
    </tr><tr><td>PS</td><td>PPSS</td><td>PPSs</td><td>PpSS</td><td>PpSs</td></tr>
    <tr><td>Ps</td><td>PPSs</td><td>PPss</td><td>PpSs</td><td>Ppss</td></tr><tr><td>
    pS</td><td>PpSS</td><td>PpSs</td><td>ppSS</td><td>ppSs</td></tr><tr><td>ps</td>
    <td>PpSs</td><td>Ppss</td><td>ppSs</td><td>ppss</td></tr></table></html>

    But I'm not at all sure any of the homozygous spider (SS) combos hatch.
    Last edited by dr del; 03-22-2009 at 03:28 PM. Reason: It doesn't support that sorry

  10. #10
    BPnet Veteran Corvid's Avatar
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    Re: Please Check my HW

    I'm pretty sure that technically PpSs would be the correct way to write out a bumble bee (or maybe it would be PpSsnnllii etc..) [to show that it's not a lesser pied as well ] but I think for someone who is starting to understand genetics and trying to get their head wrapped around it that it's ok to write it PnSn. Just because that gives them more of a visual that the ones that are not expressed will be normal.
    It's not like when you sell your snake you have to give a huge write up about it (although I'm the type of person who would appreciate it!), so whatever helps you figure it out is the best way to do it.

    I am with you 100% on pastels being heterozygous. Lesser = a Het for Blue eyed... I wish more people would acknowlege that.
    "I don't want to make money, I just want to be wonderful." ~Marilyn Monroe

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