Mendel Handout

Mendel Handout - How do traits pass from parents to offspring Gregor Mendel Father of Genetics Austrian mid 1800’s The"blending"

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Unformatted text preview: How do traits pass from parents to offspring? Gregor Mendel: Father of Genetics Austrian, mid 1800’s - The "blending" hypothesis is the idea that genetic material from the two parents blends together (like blue and yellow paint blend to make green) - The “particulate” hypothesis is the idea that parents pass on discrete heritable units (genes) - Gregor Mendel documented a particulate mechanism through his experiments with garden peas While an Augustine monk at the Abbey of St. Thomas He bred garden peas in carefully planned “crossing” or hybridization experiments He discovered two laws of inheritance 1. The law of segregation 2. The law of independent assortment Advantages of pea plants for genetic studies: I Many varieties, with distinct heritable features, or characters (such as color, seed shape, etc..i - character variations are called traits - Mating can be controlled oEach pea plant has sperm—producing organs (stamens) and egg-producing organs (carpels) oCross-pollination (fertilization between different plants) can be achieved by dusting one plant with pollen from another ogeneration times are short - Mendel chose to track only those characters that varied in an "either-or" manner 0 He also used varieties that were “true- breeding” (plants that produce offspring of the same variety when they self-pollinate) In a typical experiment, Mendel mated two contrasting, true-breeding varieties, a process called hybridization The true-breeding parents are the P generation The hybrid offspring of the P generation are called the F1 generation When F1 individuals self-pollinate or are crossed, the F2 generation is produced 6141191132 H Cowrwnsb « 7335+(“'5'15i5.‘g _../k/ E (£25.: Ail/mus om *0 iéflérmna‘y w/uflur in Ina/I/Idud/ A a’mzmnf Miro/'sz has a dammed Imung ) or a. WWW» m - For {mm/pic} 636% Mo? 63 have (ducth pkcmi'vpcs. (gm pools am) /. TE: alderman?) a! an malmdua/ with 7mm podqu éG’ 0’ 63 J 15 5’05” Mflt flit Ina’JV/afufi/ (WM 4 r'tccsnw plum 47,121 Z. 72: flap/75.7” are fXd'muwd. 6— Cr 6: "g, ‘3 qr CW 3 m a pmmfi sink/w. analysis pycoudo. W .- 9 it}: af/spr/Jaf w}// Am. awn/99635: 1/ 1% flmdL was 65' a) s: a 01 WW5? M” W W W”! IFle/M’LM‘ @ ' A exam fimshfl’w by!” 711%; ymv W Mkfith 1*; QM w+ 1, dm ‘ OWSS‘ G—IN’t Mk N WM ‘HN' ~70- 7/ HENDeL‘s LAw 0F Werewbem- ASsorer Haw 9 mm SoRI whefiew beva PZOH one Awarue‘K C aflcr nuna’d #215 15/11“ m/y 27" 75%;}? a): Mama/M by Wm :92: Mfirflr/ dim/no 5W] Mendel (1:03 DrHYBRID 0205565. (paw/uh Mew (,m'i'h rtbwo? +0 Z 00H:ch zenith J 0r dam/MM E] (WMth f GGRK 2 X 3g rr 8' 63mm? (AI/gawk im- 0J1! fiama‘, 14M 61nd L) \L Cami?) Emma“) G3 Er bum/f [MLPPLM am‘ln 6+3 Er X 4; ’ar CTR W 8* a“ “W5 Wm. 'Pmmfl' aim gm: . 6,2,? 5:! who of (ammpwgrmw +0 Mpgme PD$SIHL CDqME/s . . ' GZ’Gr)3e-) (LS-3.! Vain: fi/K’ gm) Q ...
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This note was uploaded on 02/14/2011 for the course BIOL 101 taught by Professor Chattergee during the Fall '06 term at South Carolina.

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Mendel Handout - How do traits pass from parents to offspring Gregor Mendel Father of Genetics Austrian mid 1800’s The"blending"

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