Click here for the AHL content.
Learn.Genetics at Utah is an excellent resource for this topic, and all animations are easy enough to save.
- Good animation from Biostudio (the one used in the diagrams in the presentation)
- Good animation from Learn.Genetics
- Trisomy from Learn.Genetics (their page on Down Syndrome is here)
- Excellent animation of meisosis I and meiosis II from BioStudio
- Animation and have-a-go from Learn.Genetics
Here’s a patient having an amnio:
Chorionic Villus Sampling:
- Video clip from Discovery Human Body Atlas
Sex and Gender:
Avoiding invasive tests for Down syndrome:
This news article outlines a new blood test for Down syndrome which does not require the invasive techniques of chorionic villus sampling or amniocentesis. See if you can work through the statistics posted there:
1. What proportion of all pregnancies end up terminating due to invasive tests as a result of a ‘false-positive’ scan result?
2. Compare the proportion of women needing amniocentesis or CVS in cases where the blood test is and is not used.
3. How does the blood test work – what is being detected and how? Find out more.
This is an amazing development, and connects all aspects of the Genetics units: