Genetics Mendel’s Work

Mendel’s Work 1. Gregor Mendel experimented with hundreds of pea plants to understand the process of heredity. The passing of traits from parents to offspring Only PHYSICAL traits can be passed on

Mendel’s Experiment Mendel crossed two plants that differed in height 5. In a flower, the female sex cells, or eggs, are produced by the pistil. Pollen, which contains that male sex cells, is produced by the stamen. 6. They were purebreds Always produce offspring with the same traits generation after generation

Mendel’s Experiment 7. Experiment Summary Purebred tall plants are crossed with purebred small plants F1 offspring are all tall F1 offspring are allowed to self-pollinate F2 generation are tall and small

Other Traits Studied in Experiment 8. Pod color, seed shape and flower position 9. Two forms of the trait of seed shape are round and wrinkled.

Dominant and Recessive Alleles 10. Alleles are different forms of a gene and a trait controlled by a dominant allele shows up in the organism when the allele is present 11. Only pea plants that have two recessive alleles for short stems will be short

The Science of Heredity 15. A dominant allele is represented by a capital letter. 16. A recessive allele is represented by a lowercase letter.

Mendel’s Work