Gregor Mendel story

Gregor Mendel story

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  • Hi my name is Gregor Mendel, or the father of genetics. I am going to study the way flowers blend genetics.
  • Today I'm going to show you young scientists how flowers share dna.
  • Today we are going to take pea plants and do controlled breeding experiments on them.
  • You must make a hypothesis about what will happen. I think that hybrid offspring will only have one genetic factor for the white and purple flowers.
  • I am going to use pollination with the pea plants. There is self and cross pollination. We are going to use both on two different flowers and peas(white and purple flower, green pea).
  • We are going to start with plants that are true-breeding When these pollinate, they create offspring. We are going to test them and then start our cross pollination plants.
  • Don't forget to record your traits from the flowers and the peas.. Record how they look and how they are related to the two flowers.
  • First we will remove the stamens from the purple flower. Than we will transfer the stamens of the white flower to the pistil of the purple flower.
  • The first generation of the purple flowers are called hybrid plants.They came from the true-breed plants.
  • Next, the pollinated pistil of the purple flower grew into one pea pod. Than we will plants them and they will grow.
  • Uh oh, guess what happened. When we crossed the true breeding plants with purple flowers and true-breeding plants with the white flower, all of the offspring are purple!
  • I wonder why all of the offspring are purple? Every time we tested, the results were always similar.
  • When we put the pea in the flower, the pea came out mostly yellow, smooth, with a green pod, and had a short stem.
  • About seventy-five percent of the second generation flowers where purple. These plants had one dominant factor. Twenty-five percent had white flowers and had two recessive factors.
  • The results from this experiment is that two genetic factors control each trait the offspring inherited. When organisms reproduce, each cell(sperm or egg), contributes to one factor for each trait.
  • Overall, purple flowers were our turn out for the experiment. Thanks for helping me with this experiment ladies and gentlemen. See you next time!
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