BIO Agenda Mendelian Genetics Notes Genetics Vocab Spongebob
BIO: Agenda �Mendelian Genetics Notes �Genetics Vocab �Spongebob Genetics
Gregor Mendel �Austrian monk who studied plants �Because his work laid the foundation to the study of heredity, Mendel is referred to as “the Father of Genetics”
Mendel’s Pea Plant Experiments �Created pure-bred strains by selfpollination (transfer pollen to the pistil of the same plant). These strains were known as the P 1 or parental generation TT tt
Mendel’s Pea Plant Experiments �Mendel then cross-pollinated (transfer pollen from one plant to the pistil of a different plant) these strains to create the F 1 or First Filial generation. He noticed that all of the plants in this generation had only one of the parental traits. TT Pure Tall tt Pure Short Tt Hybrid Tall
Mendel’s Pea Plant Experiments �Mendel then cross-pollinated the F 1 plants to create the F 2 or Second Filial generation. He noticed that both traits from the parental generation showed up again, but not in the same proportion. Tt Tt TT Tt Tt tt
Conclusions from Mendel’s Pea Plant Experiments � 1. Each individual carries 2 inheritable factors (alleles) for each trait but only inherits one allele for each trait from each parent � 2. Principle of Dominance: Some factors (alleles) are dominant over others and will hide the weaker or recessive factor when present � 3. Principle of Segregation: Blending does not occur.
Fire breathing ability f F Can breathe fire Can’t breathe fire
Hom Het
The combination of alleles you have Physical trait you have
Punnett Squares �Diagrams that use probability to show the possible outcomes of offspring
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