10.1 Mendel

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10.1 Mendels Laws of Heredity

• Part 2

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Mendels Research
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Mendels Research

• Monohybrid Cross
• Tall plant and short plant
• First offspring generation(F1) all tall
• Second offspring generation(F2) 3 tall 1 short
• Mendel called the tall allele dominant and the
  short allele recessive

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Laws of Heredity

• When describing experiments of heredity
• Each trait is represented by a letter
• Capital for dominant, lowercase for recessive
• TT x tt

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Laws of Heredity

• An adult plant has two alleles for a trait
• A gamete has one allele, each parent gives one
  allele to the offspring

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Laws of Heredity

• During fertilization gametes randomly pair to
  produce combinations of alleles
• Law of Segregation

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Laws of Heredity

• Genotype gene combination, TT, tt, Tt
• Homozygous two of the same alleles
• Heterozygous two different alleles
• Phenotype outward appearance
• Tall or short

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Laws of Heredity

• Law of independent assortment
• Genes for different traits are inherited
  independently

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Laws of Heredity

• Law of independent assortment
• Genes for different traits are inherited
  independently