1. Mendel and His Peas
Pg 80-81

3. Who was Mendel? Gregor Mendel- Known as the “ Father of Genetics”
Austrian monk – tended the garden at monastery
Experimented with pea plants to try and find a pattern to the way characteristics are passed from generation to generation.

4. Why study peas? Easy to grow Easy to identify traits (color, height)
Quick life cycle
Controlled mating
Lots of offspring
True breeding pairs
Easy to grown
Control mating
Lots of offspring
Quick life cyle
Easy to ID traits
True breeding

5. What traits did Mendel study?
Pea shape
Pea color
Stem height
Pod color
Pod shape
Flower color
Pea shape
Pea colo
Coat color
Pod shape
Pod color
Flower color
Flower position
Plant height

7. True breeding = always produces offspring with same traits as parents.
Mendel’s FirstCross
Produces ALL Short
short
short X
True breeding = always produces offspring with same traits as parents.
A.K.A. – Purebred or Homozygous

8. X
Produces ALL Tall
tall tall

9. Mendel’s Second Cross

10. P (parental) generation = true breeding plants (self pollinated plants)
F1 (first filial) generation = offspring
F2 (second filial) generation = F1 offspring

11. MENDEL’S Conclusion
Alternate version of genes (alleles) cause variations in inherited characteristics among offspring.
For each character, every organism inherits one allele from each parent.
If 2 alleles are different, the dominant allele will be fully expressed; the recessive allele will have no noticeable effect on offspring’s appearance.

12. Mendel’s Laws
Law of Segregation: the 2 alleles for each trait separate during gamete formation.
Law of Independent Assortment: Each pair of alleles segregates (separates) independently during gamete formation

14. Mendel’s Laws
Law of Segregation: the 2 alleles for each character separate during gamete formation.
Law of Independent Assortment: Each pair of alleles segregates (separates) independently during gamete formation (Eg. color is separate from shape)