Presentation on theme: "1 Review What did Mendel conclude determines inheritance Explain What are dominant and recessive alleles Apply Concepts Why were true breeding pea plants."— Presentation transcript:
1 1 Review What did Mendel conclude determines inheritance Explain What are dominant and recessive alleles Apply Concepts Why were true breeding pea plants important for Mendel’s experiments 2 Review What is segregation Explain What happens to alleles between the P generation and the F2 generation
2 Ch 11 Introduction to Genetics 11.1 The Work of Gregor Mendel
3 Heredity Genetics Delivery of characteristics from parent to offspring Scientific study of heredity.
4 The Experiments of Gregor Mendel Founded modern science of geneticsAustrian monkCharge of the monastery garden.
5 The Experiments of Gregor Mendel Worked with pea plantsMultiple generations each growing seasonMany traitsTraits in one of two formsEasy to growLots of offspring.
6 The Role of Fertilization StamenMale part of each flower makes pollen (contains sperm)CarpelFemale portion of each flower produces reproductive cells called eggs.
7 Fertilization Male and female reproductive cells join For peas tiny embryo encased within a seedPeas normally are self pollinatingSperm and egg are from same parent.
8 True-breeding or Pure Breeding TraitSpecific characteristic of an individual, such as seed color or plant heightMay vary from one individual to anotherTrue-breeding or Pure BreedingProduce offspring with identical traits to themselves.
9 He cut away the pollen-bearing male parts and then dusted on the pollen from a different flower.
10 HybridOffspring of crosses between parents with different traits.
11 Generations P1- original parents F1- first offspring, F is for filial F2- second generation of offspring; F1’s kids.
13 Mendel’s Two Conclusions Individual’s characteristics are determined by factors that are passed from one parental generation to the nextThese factors come in two varietiesPrinciple of dominanceSome alleles are dominant and will cover up the recessive version of the allele.
14 Genes Alleles Factors that are passed from parent to offspring Different forms of the gene.
15 DominantVersion of trait that shows up in each generation of Mendel’s experimentsCan hide the other form of that traitCapital letterRecessiveVersion that was covered up in the F1 generationLower case letter.