1 / 12

Human Heredity

Human Heredity. Karyotype. Photograph of condensed chromosomes Pair homologous chromosomes. Chromosomes. Autosomes: non-sex chromosomes Sex chromosomes: determine gender ½. Pedigree. Chart showing a trait in a family. Traits: controlled by >1 gene environment effects expression.

rone
Download Presentation

Human Heredity

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. Human Heredity

  2. Karyotype • Photograph of condensed chromosomes • Pair homologous chromosomes

  3. Chromosomes • Autosomes: non-sex chromosomes • Sex chromosomes: determine gender ½

  4. Pedigree • Chart showing a trait in a family. • Traits: • controlled by >1 gene • environment effects expression

  5. Blood Group Genes • Rh group: + (dominate) – (recessive) • ABO group

  6. Recessive Alleles • Genetic Disorders caused by two non-functional recessive alleles. • PKU: unable to break down phenylalanine. • Tay-Sachs: nervous system break down, and death in first few years.

  7. Dominate Alleles • Genetic disorders caused by one non-functioning dominate allele. • Achondroplasia: dwarfism • Huntington’s Disease: loss of muscle control and mental function.

  8. Cystic Fibrosis • Common with individuals with N. Europe ancestors. • Cells in the person’s airways are unable to transport Cl-. • Airways become clogged with mucus.

  9. Cystic Fibrosis

  10. Codominate Alleles • Sickle Cell Disease: • 1:500 African Americans • bent, twisted, & rigid RBC • clog capillaries • physical weakness, damage to the heart, brain, and spleen • common in countries with malaria

More Related