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Traits
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Traits
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Traits

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  • 1. Traits :Inherited or Learned<br />
  • 2. Genetics Background:Gregor Mendel<br />First man to understand genetics<br />He studied inheritance in Pea Plants<br />Experimented with cross pollination<br />Discovered difference between dominant and recessive traits.<br />http://en.wikipedia.org/wiki/Gregor_mendel<br />
  • 3. Dominant vs. Recessive<br />Dominant trait always appears when present<br />Recessive traits can recede in background<br />Need two recessive alleles for trait to show<br />
  • 4. Gregor Mendel&apos;s Punnett Square<br />Dominant Allele<br />Recessive Allele<br />
  • 5. Homozygous vs. Heterozygous<br />Homozygous = Two same alleles to make up a trait<br />Ex. BB, bb<br />Heterozygous = Two different alleles<br />Ex. Bb<br />www.en.wikipedia.org/wiki/genotypes<br />
  • 6. Genes<br />Hold info to build / maintain cells<br />Pass genetic info to offspring<br />Make up a sequence of DNA<br />www.en.wikipedia.org/wiki/Gene<br />
  • 7. Allele<br />Make up part of a gene<br />Make up trait of a organism<br />Need two alleles to make up a trait<br />
  • 8. Genotype <br />Full heredity information<br />Determined fully by DNA<br />Usually refers to specific character<br />http://en.wikipedia.org/wiki/Genotype-phenotype_distinction<br />
  • 9. Phenotype<br />Trait of organism<br />Molecular, physical, behavioral<br />Determined by genes as well as environment<br />Also effected by evolution / natural selection<br />Genotype + Environment = Phenotype <br />www.wiki.org/wiki/phenotype<br />
  • 10. Natural Selection<br />Evolution of an organism<br />Change occurs to help organism survive / reproduce<br />Changes phenotype not genotype<br />
  • 11. Inherited Traits<br />Traits of a person determined by genes<br />Not something that can be changed <br />Ex. Eye color, skin color<br />
  • 12. Environmental or Acquired Traits<br />Things that effect organism that are learned<br />Not effected by genes of organism<br />Ex. Language a person speaks or accent <br />
  • 13. Build your own Punnett Square<br />Fill in the blanks <br />
  • 14. Review<br />Which of the following is a example of a Inherited trait?<br />Hair color<br />Favorite food<br />Accent<br />
  • 15. Review<br />Fill in the blank<br />Genotype + __________ = Phenotype <br />Is the allele combination BB or bb an example of homozygous or heterozygous trait?<br />
  • 16. Review<br /><ul><li>Gregor Mendel studied cross-pollination in which type of plant?</li></ul>Rose <br />Pea plant<br />Corn<br /><ul><li>Are traits inherited, learned or a combination of both?</li>

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