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Auginam jauniklius :)

Standartinė lea » 2010.02.28 23:04

gal galit paaiškint kuo skiriasi duominuojantis nuo kodominuojančio geno?
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lea
 
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Standartinė viliuss » 2010.04.19 21:30

tai dabar kaip suprantu, jei mano geltona mergina, o vaikinas žalias ir jų vaikai visi trys žali, tai ir kiti vaikai (jei jie būtu) būtu visi žali :unsure:
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viliuss
 
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Standartinė Arven » 2010.04.20 06:57

Arven
 
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Standartinė lea » 2010.04.20 13:36

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Standartinė lea » 2010.04.29 23:18

tai va, radau parašyta, kad jei vienas iš tėvų turi co-dominant geną, tai kad vaikai jį taipogi turės yra 50% tikimybė :)
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Standartinė Arven » 2010.04.29 23:46

Bet kokio geno yra po dvi kopijas skirtingose homologinėse chromosomose - iš viso turim du geno alelius. Susidarant lytinėm ląstelėm į kiekvieną iš jų patenka po vieną geno kopiją, tad tikimybė, kad jauniklis gaus kažkurį alelį visada yra 50%. Tačiau jei tai bus recesyvinis alelis, mes nematysime jo fenotipinės išraiško nebent jauniklis gautų du vienodus recesyvinius alelius. Jei tai bus dominantinis alelis mes visada matysime jo išraišką. Jei aleliai kodominantinia, tai matysime jų abiejų išraiška: t.y. individas skirsis nuo 2 recesyvinius genus turinčio ir nuo 1 dominantinį kitą recesyvinį turinčio.

Tarkim balta b spalva recesyvinė, geltona G spalva dominantinė, o raudona spalva R irgi dominantinė. G ir R bus viena kitai kodominantinės.

bb individai bus balti. bG ir GG bus geltoni. bR ir RR bus raudoni. Bet GR bus oranžiniai, nes pasireikš abu kodominuojantys genai.

Nemoku aiškint. Ėch!
Arven
 
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Standartinė lea » 2010.04.30 00:04

aišku, tai kaip supratau pas mane jaunikliai bus su pusiau kuodukais? :pooh_lol:
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Standartinė lea » 2010.04.30 00:24

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Standartinė viliuss » 2010.04.30 00:28

genetika kaip ir matematika. viskas pagrįsta skaičiais. klaidų tikimybė, mokant skaičiuoti, minimali :yes4:
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Standartinė Arven » 2010.04.30 10:13

Arven
 
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