Mendel’s Pea Plants/ Dominant and Recessive

1. Mendel’s Pea Plants/ Dominant and Recessive By: Byron Castro, Anela Duenas, Antonia Sablan, Breyandel Santos & Jose Torres.

2. Facts about Gregor Mendel • Mendel studied pea plants for 8 years. • He is an Austrian Monk. • He published his results in 1865. • He was the first person to show how traits are passed from parents to offspring.

3. Why Mendel Chose Pea Plants • They are easy to get. • They grow rapidly. • Its easy to crossbreed pea plants. • Pea plants show traits that are easy to tell apart. •When left to themselves, they self-pollinate. • Pea plant seeds can also show traits.

4. HIS EXPERIMENT When Mendel bred a tall pea plant and a short pea plant, all the offspring came out tall. He allowed the first generation of offspring to self-pollinate. When they self pollinated, he took the seeds and planted them. The second generation of offspring had some tall plants and one short pea plant. He repeated the experiment multiple times, and the results were always the same.

5. VOCABULARY Dominant : Factor that determines the trait that is shown. Example: In the first generation of Mendel’s pea plants’ offspring, all the pea plants had the dominant trait. (Tallness) Recessive : A trait that is not shown. Example: In the second generation of Mendel’s pea plants’ offspring, one plant had the recessive trait. (Shortness)

6. !QUIZ! 1.) What is one reason why Gregor Mendel chose pea plants?

7. 2.) When Mendel repeated his experiment were the results always the same?

8. 3.)What’s the difference between a dominant trait and a recessive trait?

9. 4.) Did Mendel have to crossbreed the first generation of offspring? Why or why not?

10. 5.)For example, there is one tall plant and one short plant, and they were crossbred. The first generation of offspring had 4 tall plants. However, the second generation of offspring had 3 tall plants and 1 short plant. Explain why.

11. Thanks for watching!