Science in Action Notes_ Biological Diversity (3

Science in Action Notes_ Biological Diversity (3 - 1/30/12...

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Unformatted text preview: 1/30/12 Science in Action Notes: Biological Diversity (3.0) Science in Action Notes: Biological Diversity (3.0) Print 3.1 . DNA - T ransmitter of Genetic Code Cha ac e i ic a e a ed f e ge e a i a he i hi a he ge e ic c de f he a e . T hi ge e ic c de i c a ed DNA. ec ie h gh DNA T he b e i f he c e a e ia e ha i a ed f he a e he f f i gi f di a ec e c ei. T hi ec e , deso ribonucleic acid, (DNA) i he i he i ed ib e f a ia i . A i i g ga i c ai DNA i hei c e . DNA and he Gene ic C ode DNA a di c e ed i 1944. A DNA ec e c ai e ac he a e c he ic a , b he a he c he ic a c bi e de e i e he c ha ac e i ic f he ga i . Jame Wa on and F anci C ick a e ed he c e f DNA, e ea i g he e he i de c bi a i f a ia i ha a e ib e. T he DNA ec e i i e a adde i ed i a i a ( ee i age). T he ide f he adde a e he a e i a DNA ec e , b he g a e ha a e he a ia i . Eac h g ai f he f i g c he ic a : g a i e (G), c i e (C), ade i e (A) a d hia i e (T ). T he a a ge e f he e f c he ic a c ea e he c de ha he c e a e ab e i e e . T hi i he gene ic code f he ga i . C h om o om e DNA c ai a he i ci hic h c ea e he ga i ' c ha ac e i ic . T he i de f c ha ac e i ic f eac h ga i ea ha he e i a f DNA i a e c e . T hi DNA i a a ged i he c e i c ac ac age , c a ed ch omo ome . E e h a ce c ai 46 ch omo ome . I de ha e a c eeh a ga i , a 46 f he c h e be e e . N a ga i ha e he a e be f c h e (D g ha e 78, c a ha e 38). E e c e f a h a c ai 23 pai f ch e (d g 39, c a 19). N a f he c h ef ec ie ec ie a e he a e, hic h ac c f he dif f e e c ha ac e i ic be ee he ec ie . Gene A i g e gene i a i ci f he Ge e a e c a ed i Eac h c h Ge e c B ie ga i ed eg e . Re ea c he f he c h e e ge e e ha ei h ge e i a f DNA, d ai he c ded ig he f i f ): ca i ai ai c a DNA i ci f S ec if ic c ha ac e i ic ge e cc DNA c de he a e i b a hic h c ha (b be e ac he a e hi g a c hi g h ca i he ch e ca i Of f i g i he i ge e f b h ae . T he ge e e i i a a a f ib e f ha dif f e a hei e ac DNA e e c e. T he e a ia i if a e c a ed allele . T he i aec bi a i f he c h e ai i ha a e he a ia i ib e c bi i g he dif f e e a ia i f dif f e e c ha ac e i ic c ea e a ie edquest.ca/component/ /130-science-in-action-notes-biological-diversity-3 1/3 1/30/12 Science in Action Notes: Biological Diversity (3.0) a ia i . 3.2 . Cell Di ision C ell Div ision and Ase ual Reproduction Mi i Ae a e dci i ide ic a he a e . I ii c e ea c e d ic a e i DNA a d e ac c f he DNA, f d ce e ce i e e a e . A f he f f i g a e ge e ic a i g e c e ed ga i , binar fission e ab e he a e c e be ee he e ce . P i hi di i i , he a e he he i ae ac e e ac h e c e e c e i e a c ee he a e . I i- c e a ga i he ce ha h he a e be f c h e i c a ed Mitosis. C ell Div ision and Se ual Reproduction in Plants and Animals Se Me i i ae dci ai e i di id a ga i . T he f f i g ha a d c ed f hi i ha e ge e ic a dif f e e c ha ac e i ic , ha f f e a d he he ha f f he he a e - a i g a i e ff i g. D ig e a e d c i , he ec ia i ed e c e (ga e e ) i i e f a g hic h de e i he e ga i . Whe a a e ga e e a d a f e a e ga e e ei i a e ac e. Meiosis i a e f c e di i i ha d ce ce ih he DNA f a a c e . T hi ce i e c e di i i , e. 3.3 . Patterns of Inheritance e ae e, i e, ha f (Gre gor Me nde l) L g bef e he c ie c e f ge e ic a ed, e e ied he e f e e d ai , b a ig h e ga i e d c e. T hi ehd a aa cce f , b h ac ic e f c ed b eedi g ided c ie i i h he i a ee ee e ib e f ec if ic ai . e ih gh f d c e ga i ih he de i eab e ai i e ( ia a d e ), hi ai de e i e hic h Purebred VS H brid T d ce eb ed ga i , a b eede d ch e e b ed a e h e a ce ha e d c ed he de i ed c ha ac e i ic he a If a b eede c h e dif f e e ' e- b eed ' he a h brid d be , h e ae (true- breeding). d c ed. Dominant Traits edquest.ca/component/ /130-science-in-action-notes-biological-diversity-3 2/3 1/30/12 Science in Action Notes: Biological Diversity (3.0) C b eedi g dif f e e e- b eed ie c ha ac e i ic , ha i , he dominant trait. O i be c a ied . i a f he f f he DNA i ci i g ha i g he a e f he d i a ai Recessi e Traits Whe c b eedi g h b id , he a e age d ia ai a d 25% f he f f ig ib e c bi a i . O e ai i e c e e c e i e ai a ea i he f f i S ae ] e i d c e 75% f he f f i g i h he i h he ec e i e ai , bec a e he e a e 4 i e a d he ef e he a e e i ec e i e. A g if ec e i e a e e a e i he i ed. [P i Other Patterns of Inheritance Incomplete dominance c c bec a e ai . Whe he a e e a e ei he d (c bi i g he a i ). e he d ia , i a - ec e i e ec e i e, a i a e de e edia e ai a i cc Offspring Unlike Either Parent. More than one gene location a d more than one allele a be e ib e f ec if ic ai . A a e , he a ia i f ai a ff i g ha a be ac c ed f b he c e i i g f he ibi e c bi a i f ha a ic a ai . En ironmental F actors c a a ha e a bea i g h DNA i i e e ed a d de e ed. Fe a a c h d e c a be a di ec e f ac h c i d i g he de e i g age f he f f i g. T he ' a ' DNA i af f ec ed b he a c h a d i de e a . Ta i g d g ca a af f ec he DNA d i g a de e e a d def ec i he ga i ca c c . (T ha idi ide) edquest.ca/component/ /130-science-in-action-notes-biological-diversity-3 3/3 ...
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This note was uploaded on 01/30/2012 for the course SCIE 027 taught by Professor Edward during the Fall '11 term at Broward College.

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