Genic Interaction

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Genic Interaction
??????????????????????????????????????????????????
???????????????? complete dominant
??????????????????????????????????? 1 ???
????????????????????????????????????????
2
Example Epistatis Atavism Complementary
factor Duplicate factor Inhibitor
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Complementary factor
??? 2 ??? ??????????(allele)???
??????????????? ?????????????????????
????????????????????????????? ????????????????????
??????????? ?????????????????????????????????????
?????????????????
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(No Transcript)
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AAbb x aaBB AaBb
????????
????????
Parent
F1
?????????
F2
A_B_ A_bb aaB_ aabb
????????? ????????
9/16 7/16
9/16 3/16 3/16 1/16
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Genotype AA,Aa
aaB_
A_bb
Precusor
Enz.A
Gene A
Product 1
Gene B
Enz.B
Genotype BB,Bb
Product 2
antocyanin
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Epistasis
??? 2 ??? ??????????(allele)???
??????????????? ?????????????????????
????????????????????????????? ????????????????????
???????????????????????????????????
8
?????????????????????
Parent
X
??????
???????
??????
F1
F2
?????? ?????????? ???????
9/16 3/16 4/16
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???????????????? 2 ??? ??? Gene C Gene B
Gene C ???????????? Gene c ???????????????(???) CC
X cc Cc
???????(???)
????
????
Gene B ???????????? Gene b ?????????????????? BB
X bb Bb
????????
??
??
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??????
???????
CCBB x ccbb CcBb
Parent
F1
??????
F2
?????? ?????????? ??????? ???????
12/16 3/16 4/16
C_B_ C_bb ccB_ ccbb
9/16 3/16 3/16 1/16
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Polygene
????????????????????????????????????
( 3 ????????? ????????????? 40 ???)
???????????????? ???????????????????????????????
??????????????????????????????????????????
???????? normal curve
??????????????? (Quantitative Characters)
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Pleiotropism
???????????????? 1 ??? ?????????????????????????
phenotype ??????????????????
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Pleiotropism

• Phenylalnine ???????????????????? Tyrosine ???
• ???? phenylpyruvic acid ?????????? ??????????????

Phenylalnine
Tyrosine
Phenylpyruvic acid
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Pleiotropism
????????????????????????(???????????????)?????????
??????????(???????????????????????)
?????????????????????????????
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Lethal gene
??????????????????????????????????????????????????
?????????(embryo)???????????????
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?????????????
Testcross
??????????????? (homozygous recessive)
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Yy x Yy ?????? ??????
YY Yy lethal ?????? Yy
yy ?????? ??
2/3 ?????? 1/3 ?? (???????????)
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yy x yy ?? ??
yy ??
????????? (???????????)
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Yy x yy ?????? ??
Testcross
Yy yy ?????? ??
1/2 ?????? 1/2 ?? ( ???????????????)
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Creeper hen
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Sickle Cell Anemia