Flashcards in Lecture 11 Deck (14):
Pea plant breeding experiments
✴ Varied in easily described characters
- Pea shape
- Pea color
No knowledge of DNA
Experiments repeated, results repeated
• Inheritance particulate!
- characters are not diluted
What inheritance pattern did Mendel come up with?
✴ Blending or particulate?
Fundamental laws resulting from Mendel
1. Law of Segregation
2. Law of Independent Assortment
Law of Segregation
during the production of gametes the two copies of each hereditary factor segregate so that offspring acquire one factor from each parent
Law of Independent Assortment
Genes for different traits can segregate independently
during the formation of gametes
Individual’s genetic composition
Two identical alleles
Two different alleles
Visible characteristics of an individual
• Interaction of genotype & environment
genes determine the phenotypes that are passed on from parents to offspring across generations.
• A violation of independent assortment
• Genes are inherited together more often than
expected because they are on the same
What is crossing over?
exchange of genetic information between
When does crossing over occur?