Gregor Mendel and His pea plants
Updated: 5/22/2020
Gregor Mendel and His pea plants
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Storyboard Text

  • Hello my name is Gregor Mendel welcome to my pea-plant garden I have combined a purebred yellow-seeded plant with a pure bred green -seeded plant
  • I only got yellow seeds! This means that the yellow coloured trait is the dominant one since it was expressed in all of the new seeds
  • I let the new yellow-seeded hybrid plants self-fertalise and in the second generation I got both yellow and green seeds! This meant that the green trait had been hidden by the dominant yellow. This is hidden trait is called the recessive trait.
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  • From these results I inferred that each trait depends on a pair of factors one coming from the mother and the other from the father.
  • Depending on which allele was found in each seed we could have a homozygous pea where both alleles are identical. or a heterozygous pea where the two alleles are different.
  • We can use a punnet square to visualise how alleles are distributed amongst the descendants. By placing the different alleles on both axes and then figure out the possible combinations.
  • I wrote the dominant yellow allele from the pea plants as an uppercase Y and the recessive green alleles as a lowercase y. As you can see the uppercase Y overpowers the lowercase so the only time you would get green babies is if you have two lowercase y's.
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