Week 3 Conclusion

Course video 20 of 38

Mendelian or monogenic disorders are the kind of genetic disorders in humans that arise from a mutation in a single gene. These disorders run in families and can be autosomal or sex-linked depending whether the affected gene is located on autosomes or sex chromosomes, and they can also be dominant or recessive depending if one or two alleles are necessary to develop the disorder. The name “Mendelian” is used because these diseases follow simple monogenic patterns of inheritance, similar to these first studied by Gregor Mendel in pea plants. There are an estimated 8000 rare Mendelian diseases. Although each of them are very rare, collectively they affect millions of individuals world-wide. How can we find the variants and genes that are responsible for the development of these diseases? You will learn about “linkage analysis” – a technique that has been previously used for this purpose. You will also learn about Next-generation sequencing (NGS) technologies that have revolutionized the studies of Mendelian diseases in recent years.

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