BS220-5-SP-CO:
Medical Genetics

The details
2019/20
Life Sciences (School of)
Colchester Campus
Spring
Undergraduate: Level 5
Current
Monday 13 January 2020
Friday 20 March 2020
15
05 September 2019

 

Requisites for this module
(none)
(none)
(none)
(none)

 

(none)

Key module for

BSC B990 Biomedical Science,
BSC B991 Applied Biomedical Science (NHS placement),
BSC B995 Biomedical Science (Including Year Abroad),
BSC B999 Biomedical Science (Including Placement Year),
BSC BD00 Biomedical Science (Including Foundation Year)

Module description

This module aims to provide an introduction to the field of human genetics from understanding the molecular basis of genetic disease, to the application of techniques for genome analysis in the clinical genetics laboratory. The inheritance of single gene diseases and more complex multifactorial disorders will be addressed. The types of abnormalities found in the human karyotype will be studied. The origins and types of defects observed, their effect at a molecular level and on the individuals and families affected will be considered. The impact of the human genome project, molecular diagnostic techniques and potential therapeutic options such as gene therapy will be considered.

Module aims

1. Explain the significance of an individual’s genetic make-up in their risk of inherited and common disease, how the development of gene and genome sequencing has led to greater understanding of the role of genes and genetic variation, and how ‘high-throughput’ rapid and cheap methods to sequence DNA are becoming embedded in the National Health Service in the UK

2. Explain the inheritance patterns of recessive, dominant and X-linked Mendelian genetic diseases using appropriate terminology, understanding the statistical likelihood that relatives are affected or carriers

3. For named examples of Mendelian genetic disorders describe the incidence and clinical features. Explain the causative mutations and how they result in disease by impacting on the structure and function of the normal gene product.

4. Describe the UK neonatal (new-born) blood spot screening programme for genetic disorders, the key diseases screened, and interventions or treatments applied

5. Describe examples of neurodegenerative disorders caused by coding sequence CAG expansion and explain the molecular pathology of triplet repeat disorders, including inheritance and anticipation

6. Explain the structure, function and inheritance of the human mitochondrial genome

7. Explain examples of mitochondrial genetic disease and the complexity of diagnosis and transmission of mitochondrial disorders

8. Explain how ‘three-parent’ IVF may allow parents with mitochondrial mutations to have unaffected children

9. Explain the applications of genetic testing in the context of families and populations and the related ethical issues of consent and confidentiality

10. Describe the methods used to identify genetic disease alleles, including DNA sequencing, Southern blotting and PCR-based approaches

11. Discuss the relevance of animal models for human disease

12. Describe the generation of transgenic and 'knock-out' mice

13. Describe the use of genetically manipulated mice in studies of disease

14. Discuss the general approaches used for gene therapy

15. Describe the viral and non-viral methods of gene delivery

16. Describe the characteristics of oncogenes and tumour suppressor genes

17. Describe the ways in which proto-oncogenes can be activated into oncogenes

18. Describe the role of important oncogenes and TS genes in cancer development (with reference to specific examples)

19. Discuss the involvement of genetic predisposition in the development of cancers

20. Describe an example in which genetic screening for cancers can impact on the treatment given

21. Discuss the general approaches used for cancer gene therapy

22. Understand the role of cytogenetics in the development of cancers

23. Discuss an example of a chromosomal translocation that causes cancer

24. Describe the normal human karyotype and explain how errors in chromosome number arise

25. Describe examples of the common types of trisomy found in humans

26. Explain the techniques used to study the chromosome content of cells and to investigate abnormalities of chromosome number and structure, including FISH, MLPA and array CGH

27. Explain the process of prenatal screening for Down syndrome: maternal blood tests, ultrasound and karyotype analysis

28. Discuss the advantages and disadvantages of CVS, amniocentesis and the new non-invasive (NIPT) approaches being developed

29. Describe how chromosome structural abnormalities can lead to syndromes such as cri-du-chat and Charcot-Marie-Tooth disease, or to developmental delay

30. Explain the interaction of genetics and environment in determining the risk of complex diseases

31. Explain the approaches used to study complex diseases, including twin, family and population (genome wide association) studies

32. Explain the basis of genetic predisposition and environmental factors in the development of disease in asthma, coronary heart disease and atherosclerosis

33. Explain how recent developments in DNA analysis are setting a new agenda in approaches to predicting and treating human disease, including pharmacogenetics, precision medicine and gene editing

34. Describe the ethical concerns raised by DNA tests in medicine

And by completing the relevant practical assessments:

35. Access the key online sources for information about human genetic disease, such as OMIM (Online Mendelian Inheritance in Man), conduct BLAST searches of the databases storing human gene and protein sequences, and know how to use some of the tools available to investigate them (translating, aligning).

36. Apply the molecular methods of DNA extraction, PCR, restriction enzyme digestion and gel electrophoresis to investigate a human mitochondrial DNA polymorphism (RFLP), then to present and interpret critically the data to identify the alleles present.

Module learning outcomes

At the end of this module students will be able to:
1. define the structure and organisation of the human genome and genes and explain modern methods used to study genome variation and expression;
2. explain the nature of single gene and complex genetic disease, including the mechanisms of disease and the inheritance patterns observed;
3. explain the mechanisms leading to abnormalities in the human karyotype, the resulting disorders and the molecular techniques used to study chromosomes;
4. valuate the different genetic screening tests, when they are applied and their application in genetic counselling;
5. demonstrate competence in information retrieval and data analysis and interpretation.

Module information

No additional information available.

Learning and teaching methods

18 hours lectures 2 x 3 hours practicals 2 hours revision

Bibliography

  • Tom Strachan; Judith Goodship; Patrick F. Chinnery. (2014) Genetics and genomics in medicine, New York, NY: Garland Science.

The above list is indicative of the essential reading for the course. The library makes provision for all reading list items, with digital provision where possible, and these resources are shared between students. Further reading can be obtained from this module's reading list.

Overall assessment

Coursework Exam
50% 50%

Reassessment

Coursework Exam
50% 50%
Module supervisor and teaching staff
Dr Louise Beard, Dr Patrick Varga Weisz, Dr Vladimir Teif, Dr Andrea Mohr
School Undergraduate Office, email: bsugoffice (Non essex users should add @essex.ac.uk to create the full email address)

 

Availability
No
No
No

External examiner

No external examiner information available for this module.
Resources
Available via Moodle
Of 78 hours, 22 (28.2%) hours available to students:
56 hours not recorded due to service coverage or fault;
0 hours not recorded due to opt-out by lecturer(s).

 

Further information
Life Sciences (School of)

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