Wed., Dec. 4th D3: “Life Lesson”• Please copy this:– When my teacher is absent, I am a reflection of him or her.
My actions during class and towards the substitute are my own, but also are a reflection of my teacher and my respect for him or her.
• Read this from CofC’s Honor Code:
• If you’d like to leave me a note about any of this, or come talk to If you’d like to leave me a note about any of this, or come talk to me, please do--Anonymously or not.me, please do--Anonymously or not.
Chapter 9
Who’s the Who’s the Father of Modern Genetics??• 1843: – Austrian monastery
• Job = – gardening
• 1851: – University of Vienna– Studied math and
science• Statistics!!!
Gregor Mendel!Gregor Mendel!
Mendel’s Gardening ResearchMendel’s Gardening Research
• Experimented on
Characteristics Traits_________
Characteristics and TraitsCharacteristics and Traits
Mendel’s ObservationsMendel’s Observations• Seeds from purple flowers produce...• Seeds from white flowers produce...• Seeds from tall plants...• Seeds from short pants...• This always true?
3 Steps of Mendel’s Experiments3 Steps of Mendel’s Experiments
1.1.
P: P:
Self PollinationSelf Pollination
2.2.
F1:F1:
Cross Cross Pollination Pollination
3.3.
F2: F2: Ratio of offspring:Ratio of offspring:
P generationP generation
FF1 1 Generation Generation
FF2 2 Generation Generation
Statistics 3 of 4 are purple Statistics 3 of 4 are purple
Cross-pollinationCross-pollination
Self-pollinationSelf-pollination
Mendel’s Experiments Mendel’s Experiments Continue...Continue...
• 100s of times100s of times• Lots of other traitsLots of other traits• All the same results!!All the same results!!• 3:1 “phenotypic” ratio3:1 “phenotypic” ratio
Mendel’s ConclusionsMendel’s Conclusions
Review of His ResultsReview of His Results
RecessiveRecessive vs. vs. DominantDominant
What are YOU?What are YOU?Class Ratios:
Conclusions: LAWSConclusions: LAWS• Law of segregation
• Why/How?– Online Animation!
9.2 Part A
GENETIC CROSSES
Gene vs. AlleleGene vs. Allele
Genome
GENOTYPE AND GENOTYPE AND PHENOTYPEPHENOTYPE
Homozygous and Homozygous and HeterozygousHeterozygous