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Genetics: the study of the traits of organisms.

Genetics: the study of the traits of organisms. Genetics - Fact. Chromosomal disorders affect about 7 of 1000 live-born infants and account for about half of all spontaneous first-trimester abortions. Gregor Mendel- is known as the father of modern genetics. Gregor Mendel    1822-1884  .

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Genetics: the study of the traits of organisms.

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  1. Genetics:the study of the traits of organisms.

  2. Genetics - Fact • Chromosomal disorders affect about 7 of 1000 live-born infants and account for about half of all spontaneous first-trimester abortions.

  3. Gregor Mendel-is known as the father of modern genetics. Gregor Mendel    1822-1884  

  4. Mendel's genius was that he noticed differences in peas being grown in his gardenand applied the scientific method to determine the cause of these differences.

  5. He published a paper in 1865 with these three conclusions to his research:

  6. He published a paper in 1865 with these three conclusions to his research: • Principle of Dominance and Recessiveness - One factor in a pair may mask the effect of the other.

  7. He published a paper in 1865 with these three conclusions to his research: • Principle of Dominance and Recessiveness - One factor in a pair may mask the effect of the other. • Principle of Segregation - The two factors for a characteristic separate during the formation of eggs and sperm.

  8. He published a paper in 1865 with these three conclusions to his research: • Principle of Dominance and Recessiveness - One factor in a pair may mask the effect of the other. • Principle of Segregation - The two factors for a characteristic separate during the formation of eggs and sperm. • Principle of Independent Assortment - The factors for different characteristics are distributed to reproductive cells independently.

  9. Break time • As the Holidays approach people start to put on a few pounds.

  10. Break time • As the Holidays approach people start to put on a few pounds. So, • Push away

  11. Break time • As the Holidays approach people start to put on a few pounds. • Push away • Push away or else

  12. At the time of Mendel's work, chromosomes and the process of mitosis and meiosis (blending of traits) were unknown.

  13. Could this relate to your life? • At the time of Medel's work, chromosomes and the process of mitosis and meiosis were unknown. • Mendel's work was considered obscure and unimportant until 1900, when Walter Sutton proposed the Chromosome Theory.

  14. Important genetic terms: • Genotype - the genetic makeup of an organism. • Phenotype - the external appearance of an organism. • Homozygous trait - the genes for that trait are the same. • Heterozygous trait - the genes for that trait are not the same.

  15. More Important genetic terms: • Monohybrid cross - a cross between individuals with one pair of contrasting genes. • Dihybrid cross - a cross between individuals with two pairs of contrasting genes. • Parents - the two organisms whose genes produce offspring. • F1 generation - the offspring from parents. • F2 generation - the offspring produced by crossing two F1 individuals.

  16. A few more important terms: • Gene – a section of DNA that codes for a trait • Allele – a specific form of a gene

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