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| Punnet Square Extra Credit help! PLZ!!!!? I have an extra credit punnett square that I absolutely need to pass. Okay, here it is. In some tiger horses a spotted coat is dominant to a non-spotted coat, large nostrils is dominant to small nostrils, and curved ears are dominant to not curved ears. Cross a non-spotted, homozygous large nostril, homozygous curved eared tiger horse. With a heterozygous spotted, homozygous large nostril, heterozygous curved ear horse. WHAT IS THE PHENOTYPE RATIO!!! Help, I need it for tomorrow! PS: I need to have it done in only ONE 8x8 PUNNET SQUARE!!! YES AN 8x8 PUNNETT SQUARE! |
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| 3 dominant:1 recessive, or 3BB:1Bb ... here I was just using B for dominant, b for recessive Sorry if this is a bit off -- I haven't done these in two years. Ok, I redid it, again a bit unsure due to the long while it's been since I've done these and got SsSNSC:NsNNNC |
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| S = spotted, s = nonspotted L = large nostrils, l = small nostrils C = curved ears, c = non-curved ears ssLlCC x SsLLCc http://img517.imageshack.us/my.php?image=punnettnm0.jpg The answer: 50% Spotted, Large, Curved 50% Non-spotted, Large Curved aka, 1:1 for Spotted, Large, Curved : Non-spotted, Large, Curved |
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| Thread | Thread Starter | Forum | Replies | Last Post |
| what does this extra credit mean? | maloonyguy.4all | Credit | 0 | 03-17-2008 01:04 AM |
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| extra credit!? | mashaa | Credit | 0 | 03-07-2008 01:02 PM |
| Biology Punnet squares? | wondergrrl | Biology | 0 | 03-02-2008 06:12 PM |
| Please help with my biology extra credit? | snowboarder | Biology | 1 | 02-23-2008 08:52 PM |