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