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BIOLOOGIA RIIGIEKSAMITE ÜLESANDEID

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....................................................................................................................................................<br />

6.16. Joonisel on kujutatud kahe erineva geenmutatsiooni toimumist. Seletage joonise<br />

põhjal, milles need seisnevad.<br />

5 punkti<br />

Mutatsioon A: .............................................................................................................................<br />

....................................................................................................................................................<br />

Mutatsioon B: .............................................................................................................................<br />

.....................................................................................................................................................<br />

Nimetage üks mutageen ......................................................<br />

Enamus mutatsioone on organismile kahjuliku mõjuga. Selgitage, millistel juhtudel<br />

mutatsioonide kahjulik mõju ei avaldu.<br />

1) .................................................................................................................................................<br />

.....................................................................................................................................................<br />

2) .................................................................................................................................................<br />

.....................................................................................................................................................<br />

6.17. Bioloogialeksikon annab järgmise selgituse: Organismide modifikatsiooniline<br />

muutlikkus tuleneb geenide ja keskkonnatingimuste koosmõjust ega mõjuta<br />

genotüüpi.<br />

Tooge esitatu põhjal üks näide modifikatsioonilise muutlikkuse kohta<br />

taimedel, loomadel ja inimesel.<br />

3 punkti<br />

Taimedel: .................................................................................................................................<br />

..................................................................................................................................................<br />

Loomadel: ................................................................................................................................<br />

..................................................................................................................................................<br />

Inimesel: ..................................................................................................................................<br />

..................................................................................................................................................<br />

38

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