1 / 22

Genetics

Genetics. Heredity. The transmission of characteristics from one generation to the next. Genetics is the study of how heredity works. Gregor Mendel discovered particulate inheritance. Who was Mendel (1822-1884)?.

kerem
Télécharger la présentation

Genetics

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Genetics

  2. Heredity The transmission of characteristics from one generation to the next. Genetics is the study of how heredity works. Gregor Mendel discovered particulate inheritance

  3. Who was Mendel (1822-1884)? Gregor Mendel was an Augustinian monk, and avid gardener and bee keeper, an experimental physicist, a teacher, and the founder of modern genetics.

  4. The Homunculus Preformationism – a tiny human called a homunculus is present in each sperm. Mendel discovered particulate inheritance: think meiosis

  5. DNA The molecule (particle) of heredity

  6. Chromosomes Long strands of DNA wrapped around histones

  7. Karyotype – boy or girl?

  8. Genes Exist on chromosomes Turn one on and a protein is made

  9. Allele Alternate forms of same gene A a

  10. More vocab! • Genotype – which set of alleles (Aa) • Phenotype – which trait (purple flower) • Dominant – shows trait if AA or Aa • Recessive – shows trait only if aa • Homozygous – alleles are identical (AA or aa) • Heterozygous – alleles are different (Aa)

  11. Question Are dominant phenotypes more common than recessive phenotypes? Your hypothesis? Yes / No

  12. Eye Color Brown eyes are dominant to blue eyes. What is your Phenotype?

  13. Widow’s Peak A widow’s peak is dominant to a straight hairline

  14. Hitch Hicker’s Thumb • A hitch hiker’s thumb is a recessive trait.

  15. Bent Little Finger A bent little finger is dominant to a straight one. Hold your hand out in front of you with your fingers together.

  16. Earlobes Unattached earlobes is dominant to attached earlobes.

  17. Tongue Curl If you can curl your tongue, you have the dominant allele.

  18. Freckles Having freckles is dominant.

  19. Hairy Knuckles Any hair on your knuckles means you are dominant.

  20. Interlocking Fingers Left thumb over right thumb is dominant to right thumb over left thumb.

  21. Mendelian Traits

  22. Homework • Find phenotype for your parents • Find phenotype for all siblings • Add information to your table • Due Thursday

More Related