Learn all about genetic disorders in just a few minutes! Jessica Pamment, professional lecturer at DePaul University, details the diseases that result from mutations in damaged genes or abnormal numbers of chromosomes.

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What if humans could be edited to run faster, jump higher, and think bigger? What if disease could be eradicated before it ever came to be? These are the questions that no longer belong in just comic books, but in the laboratory of the Innovative Genomics Institute’s Scientific Director, Jacob Corn. In this talk, he explores the future and ethics of CRISPR/Cas-9 genome editing.

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Jacob Corn is the Managing Director and Scientific Director of the Innovative Genomics Initiative and faculty at UC Berkeley in the department of Molecular & Cell Biology. Jacob’s research generally bridges reductionist mechanism with cell biology, with the overarching goal of understanding how biophysical properties interact within the cellular environment to shape signaling behavior and how disease arises when these properties go awry. As the director of the IGI, Jacob is committed to pushing the boundaries of next-generation genome editing for transformative insights into fundamental biologies and to laying the groundwork for clinical and commercial applications of the technology.

This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx

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Inherited Genetic Disorders | Genetics | Biology | FuseSchool

This girl has six fingers on her left hand. She has a condition called polydactyly, which causes extra fingers or toes. Her father and grandmother as well as some of her cousins also have the condition. This should give you a clue about how she came to have it… any ideas? Well, polydactyly is an example of a genetic disorder – it is inherited. You inherit genes from your parents, and you have two copies of each gene – one from your mother and one from your father. Genes come in different forms, called alleles. Alleles may be recessive or dominant.

So going back to Polydactyly… Polydactyly is caused by a dominant allele, shown as a capital P. You only have to have one copy of this allele to have the condition. So in an example the father has a copy of this allele, but the mother does not… Offspring with one dominant allele big P, and one recessive allele little p will also have the condition. Whereas these offspring won’t have the condition. Can you see what their genotype must be…? Little p, little p – so two copies of the recessive allele.

Another example of an inherited disorder is cystic fibrosis. If you want to discover more about cystic fibrosis, and how it affects the body then watch this video [insert link to ‘cystic fibrosis’ video].

Cystic fibrosis is inherited in a different way to polydactyly. Take a look at this genetic diagram and see if you can figure out how it is different.

To have cystic fibrosis, you have to inherit two recessive alleles. The parents in the diagram are both carriers of the recessive allele, little f. They do not have the disorder themselves but they could both pass the recessive allele to their children.

Quite often, people do not know they are carriers of cystic fibrosis until they have a child with the disorder. This can be very upsetting, as it is a serious condition.

Parents are able to make sure they do not have another child with the disorder using embryo screening.

Let’s finish off with a little discussion about what embryo screening is.

Embryo screening can be used to ensure embryo’s do not suffer from inherited genetic disorders.

To do this, the parents would use in-vitro fertilisation, which is also known as IVF.

IVF is where eggs and sperm are mixed in a dish in a lab outside of the body. Each fertilised egg would be left to grow until it reached a few cells big, and then one cell from each embryo is removed and its genes tested to see if it has the genetic disorder. Only unaffected embryos – a maximum of two – would be placed back into the mother’s uterus to grow and hopefully develop into a healthy baby.

There are many issues surrounding embryo screening. One ethical issue is that the unused embryos, potential lives, are destroyed. Also, there are social concerns – IVF is not always successful and this can be upsetting for the parents and their family. Finally there are also economic issues because IVF is an expensive process.

So there we have a few examples of inherited genetic disorders. These are inherited from your parents, resulting from certain alleles your parents have been carriers of.

Sometimes genetic disorders are caused by dominant alleles – like polydactyly so it can be inherited from one parent – and others are caused by recessive alleles – like cystic fibrosis – so both parents need to carry the allele.

CREDITS
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Narration: Dale Bennet
Script: Gemma Young

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This video “Genetic Diseases: Categories” is part of the Lecturio course “Genetics” ► WATCH the complete course on http://lectur.io/geneticdiseasescategories

► LEARN ABOUT:
– Categories of Genetic Diseases
– Chromosome disorders
– Single-gene disorders
– Multifactorial disorders

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Dr. Georgina Cornwall has taught a broad array of Biology courses at different U.S. universities, currently at the Colorado Mountain College in Aspen. Dr. Cornwall is an active promoter of hybrid teaching formats like online and interactive courses. Thus, she uses modern technology to engage her students in the diverse disciplines of biology – from Microbiology to Genetics.

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Dr. Gus Kousoulas is an Associate Vice President for Research & Economic Development at Louisiana State University. Dr. Kousoulas joined the LSU faculty in 1988 and became full professor in 1994. He is currently professor of virology and biotechnology at the LSU School of Veterinary Medicine, with adjunct appointments at the LSU Department of Biological Sciences, LSU College of Science and the the Department of Microbiology, Immunology and Parasitology at the LSU Health Sciences Center in New Orleans, and the LSU Health Sciences Center’s Stanley S. Scott Cancer Center in New Orleans. He also holds an appointment in the School of Animal Sciences at the LSU AgCenter, and he is an affiliate member of the Tulane National Primate Research Center located in Covington, La.

He is the lead researcher of the LSU-Tulane “Center for Experimental Infectious Diseases,” which is funded by the National Institutes of Health. His research interests are focused on the molecular biology of human herpes viruses, including Kaposi’s Sarcoma Associated Herpes virus, which causes Kaposi’s cancer in humans. Kousoulas has extensively utilized viral vectors for vaccine development and cancer treatment, and has constructed and patented herpes simplex viruses that can selectively replicate in human breast cancer cells providing a unique approach to treatment.

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