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P o l i g e n

Kelompok 3 Sigit Budi P. 115040201111061 Muhammad Arifin 115040201111062 Annisaa Rahmawati 115040201111063 Nanik Indah D.w . 115040201111064 Sinta Juwita 115040201111065 Hesty 115040201111066 Akhmad Hadi F. S. 115040201111067

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P o l i g e n

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  1. Kelompok 3 Sigit Budi P. 115040201111061 Muhammad Arifin 115040201111062 AnnisaaRahmawati 115040201111063 Nanik Indah D.w. 115040201111064 SintaJuwita 115040201111065 Hesty 115040201111066 AkhmadHadi F. S. 115040201111067 Dian Prabawti 115040201111068 IntanDwi P. W. 115040201111069 EmiraDyahLarasati 115040201111070 Poligen

  2. PengertianPoligen Poligenmerupakansuatuseri gen ganda yang menentukansifatsecarakuantitatif. Dalamhalini, pewarisansifatdikendalikanolehlebihdarisatu gen padalokus yang berbedadalamkromosom yang samaatauberlainan.

  3. SejarahPoligen Pewarisansifat yang dikendalikanolehpoligentersebutpertama kali ditemukanpadatanamantembakau (Nicotianatabacum) oleh J. Kolreuter (1760). Saatmenyilangkantanamandenganduasifatbeda, keturunan yang didapatpada F1 adalahintermediet, sedangkan F2 terdapatbanyakvariasiantarakeduatanamaninduknya. Sifatketurunanterlihatberderajatberdasarkanintensitasdariekspresisifatitu.

  4. PEWARISAN GEN GANDA • Variasisifatketurunanpengaruh gen ganda (Multigen/Poligen) • Poligen • Tumbuhan :tinggi, berat, waktu yang diperlukanuntukmenjadidewasa

  5. Banyaknyatambahanpengaruhsetiapalelefektif = (jumlahperbedaankualitatif)/(jumlahalelefektif) Contoh: padatanamantomat, induk A berbuahdenganberat 10 grdaninduk B berbuah 22 gr P. AxB F1 C (buahdenganberat16gr) F2 150 tanaman 10 tanaman = 10 gr 10 tanaman=22gr • Maka, sifat yang sepertiinduk (1/4)n =10/150 (1/4)n=1/15 n=2

  6. Jadiada2pasanggenyangberperan Tambahanpengaruhalelefektif=(22-10)/4=3gr P. AABB(22gr)xaabb(10gr) F1. AaBbxAaBb(16gr) F2. AABB(22 gr)= 1 Aabb(13 gr) =2 AA Bb (19 gr)= 2 aa BB (16 gr)= 1 Aa BB (19 gr)= 2 aa Bb (13 gr)= 2 Aa Bb (16 gr)= 4 aa bb (10 gr)= 1 AA bb (16 gr)= 1 Perbandingan fenotip F 2 yang ada = 1 (22 gr): 4 (19 gr): 6 (16 gr): 4 (13 gr): 1 (10 gr)

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