28 - o One from each parent • Dominant recessive • Low of segregation – has to do with how alleles are passed on ← Bread green peas and

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Bio 102 28/01/2008 10:16:00 # of possible combinations of chromosomes Abbot Cyril Napp: What is inherited How is it inherited What is the role of chance in heredity Johann Medel 1872-1844 1843 Medal joins monastery at Bruno Then was sent off to University of Vienna Wanted to be a teacher: applied and was rejected  Gregor (instead of Johann) – renamed when entered monastery Known for his research involving pea plants Why were peas such a good choice? They grow well Self fertile: (stigma, ovules, and anthers) Grown lots of peas in a small amount of space Lots of strains of peas Yellow, green, round, wrinkled, etc. True breading 1865 at the age of 43 he published a paper, “Experiments on Plant Hybrids” Four basic ideas: Alternative versions of what we would call genes or “alleles” o Account for inherited variation For each character, inherit 2 copies
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Unformatted text preview: o One from each parent • Dominant, recessive • Low of segregation – has to do with how alleles are passed on ← Bread green peas and yellow peas • F1-All offspring are yellow peas • F2-Then yellow peas and green peas ← Yellow dominate over green peas but green is not lost (recessive). ← Parental generation – YY (yellow) & yy (green) • F1-Yy & Yy (yellow) ← Gametes ← Phenotype (appearance) ← Genotype (genetic) ← Punnet Square ← Test cross & Back cross ← Heterozygous & Homozygous ← Parents • Yellow and smooth o YYRR • Green and wrinkled o Yyrr ← F1-YyRr and YyRr ← F2- YR & Yr & yR & yr • Punnet square – Ration Phenotypes – 9:3:3:1 ← Main causes for genetic variability: ← Law of independent assortment Crossing over 28/01/2008 10:16:00 ← 28/01/2008 10:16:00 ←...
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This note was uploaded on 03/03/2008 for the course BIO G 102 taught by Professor Walcott during the Spring '08 term at Cornell University (Engineering School).

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28 - o One from each parent • Dominant recessive • Low of segregation – has to do with how alleles are passed on ← Bread green peas and

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