Sexlinked notes Sex Determination People 46 chromosomes or

Sex-linked notes

Sex Determination People – 46 chromosomes or 23 pairs • 22 pairs are homologous (look alike) – called autosomes – determine body traits 1 pair is the sex chromosomes – determines sex (male or female) • Females – sex chromosomes are homologous (look alike) – label XX Males – sex chromosomes are different – label XY

Sex-Linked Notes If a gene is found only on the X chromosome and not the Y chromosome if the gene is recessive, males only need 1 gene to show trait rather than 2 this is why males show trait more often Example: Red/Green Colorblind, male pattern baldness, hemophilia, Duchenne, Muscular Dystrophy Females sex genes are both XX, homozygous recessive

Video Genetics Disorders Gallery Walk You can use your own device to complete this assignment. The groups must split up the work according to topic and write the information on the Genetic Disorder you all assigned. You will only have 20 minutes to complete the research and fill it out on Chart paper so the other groups can record what you wrote for you groups’ assigned Genetic Disorder.

Launch: Puppies born through IVF can shed light on human genetic disorder

Genetic Disorders PKU Huntington’s Disease Tay Sachs Turner’s Syndrome Kleinfelters Down’s syndrome Description Autosomal or Sex chromosome Who discover it? Characteristics (Physical traits) Effects (inner problems) What number chromosomes is this found on?