Pedigree Chart For Tay-sachs Disease

Pedigrees – Human Genetic Disorders

This worksheet gives students a run a risk to practice identifying genotypes on pedigree charts. The pedigrees focus on human genetic diseases, such as albinism, cystic fibrosis, tay-sachs, and sickle cell anemia. Some students do struggle with these charts, so I usually practise doing a few with them. If the parents are both heterozygous (Aa x Aa) many students will be confused about the genotype of an offspring who does not have the disease. In that case, if there isn't enough information, it is acceptable to write the genotype as "AA or Aa."

Sex-linked traits are not on this practice worksheet, since I reserve that for later lessons on sex activity-linkage. Intro level classes are shown a pedigree of a sex activity-linked nautical chart simply are not required determine genotypes in those cases.

Shown beneath is a very simple slide presentation I share with the intro classes, which also describes the diseases. Sickle cell anemia is a story-line thread that connects many of the lessons for that semester-long biological science course. For case, they already learned well-nigh how a single modify in Dna tin can lead to a change in the protein for hemoglobin.

Link to Google Slides: Studying Homo Genetics

Grade Level: 9-12
Time Required: 15 -20 minutes

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