Cornell Notes Meiosis Day 1 PDF

Title Cornell Notes Meiosis Day 1
Author Azanna
Course Developmental Biology
Institution Clark University
Pages 3
File Size 222.8 KB
File Type PDF
Total Downloads 3
Total Views 203

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Description

Co r n e l l No t e s

L e a r n i n gT a r g e t :SB3. Obtain, evaluate, and communicate information to analyze how biological traits are passed on to successive generations. a. Use Mendel’s laws (segregation and independent assortment) to ask questions and define problems that explain the role of meiosis in reproductive variability.

Na me :

DAY 1-Meiosis

Cl a s s / Pe r i o d : Da t e :

Es s e n t i a l Qu e s t i on :

Qu e s t i on s :

No t e s : Me i o s i sNo t e s Or g a ni s mst h a tr e p r o du c eSe x u a l l ya r ema d eu po ft wod i ffe r e n tt y p e so fc e l l s . 1 .So ma t i cCe l l sa r e“ b o d y _ ”c e l l sa n dc o n t a i nt hen o r ma l n u mbe ro f c h r omo s o me s…. c a l l e dt h e“ d i p l o i d”n u mb e r( t h es y mb o l i s2 n) . Ex a mp l e s wo ul db e… s k i nc e l l s , b r a i nc e l l s , e t c . s e x”c e l l sa n dc o nt a i no n l yh a l ft h en o r ma l n u mb e ro f 2 .Ga me t e sa r et h e“ c h r omo s o me s …. c a l l e dt he“ h a p l o i d”n u mbe r( t h es y mb o l i sN) …. . Sp e r m c e l l sa n do v aa r eg a me t e s .

1 .Wh a t a r et h e me t e s d i ff e r e n c e s Ga b e t we e n • T heMa l eGa me t ei st h eSp e r m. So ma t i cCe l l s a n dGa me t e s ? • T heF e ma l eGa me t ei st h e Ov u m. 

F e r t i l i z a t i o n, t h ej o i n i n go f t h es p e r ma n do v u m , r e s u l t si nt h ef o r ma t i o no f t hez y g o t e. ( f e r t i l i z e de g g)

2 .Ho wma n y p a i r so f Ho mo l o g o u s c h r o mo s o me s Ch r o mos o me s d o e sap e r s o n h a v e ? p l o i dn u mb e r( 2 n ) • I fa no r g a ni s mh a st h edi i th a sama t c h i n gp a i ro fh o mo l o go u sf o r e a c hc h r o mos o men u mb e r . On eo f t heh omo l og u e s 3 .Wh a t a r e t h e r( a n d c ome sf r o mt h emo a l l e l e s ?Gi v e h a st h emo t he r ’ sDNA) . …t h e e x a mp l e s o t h e rh omol o g u ec ome sf r o m t h ef a t h e ra n dh a st hef a t h e r ’ s DNA) .



Mo s to r g a n i s msa r ed i p l o i d. Hu ma n sh a v e2 3s e t sofc hr omo s o me s … t h e r e f o r eh u ma n sha v e4 6 _t o t a l c h r o mo s o me s …. . Th ed i pl o i dn u mbe rf or h u ma n si s4 6( 4 6 c h r omo s o me sp e rc e l l ) .

Ba s i cGe n e t i cI n f o r ma t i o n h r o mo s o me s • G e n e s a r e l o c a t e d o nc 4 .Wh ya r e • Al l e l e sa r ea l t e r n a t ef o r mso fag e n e Ho mo l o g o u s • E X : T h e g e n e f o r e y e c o l o r i s o n a c h r omo s ome , i tc a nh a v es e v e r a l d i ffe r e n t c h r o mo s o me s a l l e l e s : b l u e , b r o w n , g r e e n n o t a l wa y sb e i d e n t i c a l ? Ho mol o g o usCh r o mo s ome s • Pa i r s_ o fc h r o mo s o me s( ma t e r n a l a nd p a t e r n a l )t h a ta r es i mi l a ri ns h a p ea n ds i z e . • Ho mo l og o u sp a i r s( t e t r a ds )c a r r yg e n e s c o nt r ol l i n gt hes a mei n he r i t e dt r a i t s . o c u s _ ( p o s i t i o nofag e ne )i si nt h e • Ea c hl s a mep o s i t i o no nh omo l og u e s . o mo l o g o u s • Hu ma n sh a v e2 3pa i r so fh c h r omo s o me s 5 .Wh i c h u t o s o me s 2 2p a i r so fa Ch r o mo s o me s 1p a i ro fs e xc h r omo s ome s_ a r e b e c a u s eaho mo l og ou sp a i rc on s i s t so f4c hr oma t i d si ti sc a l l e da“ T e t r a d ” ) a u t o s o me s ? * * * * Ma yn o ta l wa y sbei d e n t i c a l b e c a us ea l l e l e sc a nb ed i ffe r e nt * * * * * * omo l og o u sCh r o mo s o me s Hu ma n sh a v e2 3Se t sofh Ea c hHo mo l og o u ss e ti sma d eu po f2Ho mol o g u e s Au t o s o me s 1 .T h eAu t o s o me sc o d ef o rmo s to ft h eo ffs p r i n g ’ st r a i t s. 2 .I nHu ma nst h e“ Aut o s ome s _ ”a r es e t s1–2 2 SEXCh r o mo s o me s 1 . T h eSe xCh r o mo s o me sc o d ef o rt h e s e xo ft h eo ffs pr i n g . 2 . I ft h eo ffs pr i n gh a st wo“ X” c h r omo s o me si twi l l b eaf e ma l e . 3 . I ft h eo ffs p r i n gh a so n e“ X” c h r omo s o mea n don e“ Y” e ma l e. c h r omo s o mei twi l l b eaf * * * * * I nHuma nst h e“ Se xCh r o mo s o me s ”a r et h e2 3s e t * * * * * * *

Qu e s t i on s : Ex t e n s i o n :

Su mma r y : Us i n gt h ewo r d sf r o mt h ep p t , Co mp a r ea n dc o n t r a s t t h e2ma j o rt y p e so f c h r o mo s o me s . Wh i c ho n ei sd i p l o i d ?Wh i c ho n ei sh a p l o i d...


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