Heredity: Mendel's Garden

The video tutorial discusses Gregor Mendel's experiments with pea plants, focusing on traits such as flower position, pod color, and plant height. Mendel used true breeders to ensure consistent offspring traits. He crossbred tall and short pea plants, observing that the first generation was all tall. Through self-pollination, the second generation revealed a 3:1 ratio of tall to short plants, demonstrating the reappearance of the short trait.

What is the term used for plants that consistently produce offspring with the same traits as themselves?

• Mutant strains

• Cross-pollinators

• True breeders

• Hybrid plants

In Mendel's first generation experiment, what was the outcome when a tall pea plant was crossed with a short one?

• Three-quarters were tall

• All offspring were tall

• Half were tall, half were short

• All offspring were short

What process did Mendel use to allow the first generation of tall plants to pollinate themselves?

• Cross-pollination

• Natural selection

• Self-pollination

• Artificial selection

In the second generation of Mendel's experiment, what fraction of the plants were short?

• One-half

• One-third

• One-quarter

• All were short

Why did the short trait reappear in the second generation of Mendel's experiment?

• It was a mutation

• It was a recessive trait

• It was a dominant trait

• It was due to environmental factors