Mendelian Genetics

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Mendelian Genetics
Gregor Mendel, Augustinian Monk (Augustinians A
Catholic religious order)
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Mendelian GeneticsVocab

• 1. Gregor Mendel
• 2. Dominant
• 3. Recessive
• 4. Allele
• 5. Phenotype
• 6. Genotype
• 7. Heterozygous
• 8. Homozygous

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Vocab

• 9.Monohybrid Cross
• 10. Dihybrid Cross
• 11. F1 generation
• 12. Law of Segregation
• 13. Law of Independent Assortment
• Mendel Video
• Historical Study of Genetics, video
• Mendel theory Video 2

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Mendel Videos

• Pea Plant Experiments video
• Mendel Video..\MendelVideos\Punnett_Square__Charti
  ng_Dominant_and_Recessive_Traits.asf
• 14. Codominance
• Two dominant alleles are expressed at the same
  time. Ex. Roan Coat in horses ( White and Red
  Hairs)
• 15. Incomplete Dominance The phenotype of a
  heterozygote is intermediate . Red and white
  flowers produce PINK.(in Snapdragons) RR x rr
  Rr (pink)

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Mendels Pea Plants

• Cross-pollination

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Pea Plants

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Mendelian Traits in Pea Plants

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Monohybrid Cross PeasTT x tt

• TT ( Homozygous Dominant) crossed with tt (
  Homozygous Recessive)

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Monohybrid Cross Peas

• P Generation TT x tt
• F1 generation Phenotype
• 100 Tall pea plants
• Genotype
• 100 Heterozygous , Tt

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Monohybrid Cross Peas

• F1 Tt x Tt
• F2 Generation Genotypes TT, Tt, tt
• F2 Genotypes TT 25
• Tt 50
• tt 25 ( So, the ratio is 121 )
• What at the possible Phenotypes?
• What is the Phenotype ratio?
• 75 Tall, 25 short ( So, the ratio is 31)

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Corn Lab

• Purple is dominant (P)
• Yellow is recessive (p)
• Starchy, plump is dominant (S)
• Sweet, wrinkled is recessive (s)
• P- Generation PP x pp What ratios?
• Test Cross Pp x pp What ratios?

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Monohybrid Cross, F2Bb x Bb
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F1 Generation, Dihybrid Cross SsBb x SsBb
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Dihybrid Cross F1, F2
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Dihybrid Cross Peas (P generation) RRYY x rryy
R Round, dominant r wrinkled , recessive Y
yellow, dominant y green recessive
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