Chapter 12.1: The Mystery of Heredity Flashcards
Define hybridization
the mating of unlike parents
What is the mating of unlike parents?
hybridization
Who was Josef Klreuter?
the first investigator to document successful experimental hybrids using tobacco
Who was the first investigator to document successful experimental hybrids using tobacco?
Josef Klreuter
Define true-breeding
said of a breed or variety of organism in which offspring are uniform and consistent from one generation to the next
What is said of a breed or variety of organism in which offspring are uniform and consistent from one generation to the next?
true-breeding
What is true-breeding due to?
This is due to the genotypes that determine relevant traits being homozygous
Define segregating
the process by which alternative forms of traits are expressed in offspring rather than blending each trait of the parents in the offspring
What is the process by which alternative forms of traits are expressed in offspring rather than blending each trait of the parents in the offspring?
segregating
Why was the garden pea practical for use?
- Peas used in earlier investigations
- Large number of pure varieties of peas were available
- Pea plants are small and easy to grow, and they have a relatively short generation time
- Both the male and female sexual organs are enclosed within each pea flower
Define self-fertilization
the union of egg and sperm produced by a single hermaphroditic organism
What is the union of egg and sperm produced by a single hermaphroditic organism?
self-fertilization
What as the first stage of Mendel’s Experiment?
• Mendel allowed plants of a given variety to self-cross for multiple generations
What as the second stage of Mendel’s Experiment?
• Mendel then performed crosses between true-breeding varieties exhibiting alternative forms of traits
What as the third stage of Mendel’s Experiment?
• Mendel permitted the hybrid offspring produced by these crosses to self-fertilize for several generations
