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Your behaviour, genetics, and the environment

15 June 2021 | Story Leonie Bolleurs | Photo Supplied

Zurika Murray says the study of Behavioural Genetics at the UFS focuses on human behaviour, specifically neurotransmitter systems, such as serotonin that may contribute to specific behavioural patterns.

Hi. I am John. I have anger issues.

Just like John, there are thousands of South Africans with anger issues, often leading to violent crimes such as the more than 21 000 murder cases and 165 000 plus assault cases reported in 2020, according to a study by the South African Police Service and Statistics South Africa.

Aggression can be a great threat to society when it leads to violence. However, it can also be an absolute necessity when it leads to perseverance and a drive towards success and survival. This is according to Zurika Murray, a lecturer in the Department of Genetics at the University of the Free State (UFS), who is doing research on behavioural genetics.

Behavioural genetics

She explains behavioural genetics as a study of genetic variation contributing to how an organism interacts with and within its environment. “At the UFS, we focus on human behaviour, and specifically neurotransmitter systems, such as serotonin that may contribute to specific behavioural patterns.”

When one has the right amount of serotonin in your body, it is easier to have stable moods and a sense of well-being.

She says the neurotransmitter (which plays a role in, among others, emotional regulation) acts as a mediator, relaying messages and influencing response to environmental stimuli. “This system is very adaptable, facilitating our functioning in an ever-changing emotional environment; but when dysfunctional, it can cause quite a number of abnormalities, from anxiety and depression to dysfunctional impulse control and violence. When some individuals are exposed to adverse developmental environments such as abuse and neglect, they can develop aggression and violence.”

“One of our current projects looks specifically at male juvenile delinquency and monoamine neurotransmitter systems (such as serotonin) that may contribute to specific characteristics (such as impulsivity) of delinquency.”

According to Murray, their research is also looking at the genetic variation within specific neurotransmitter genes to see if they could find similarities among individuals with similar developmental backgrounds. “This neurotransmitter system additionally responds relatively well to physical activity as a management strategy for aggression in some individuals. We are looking at variations in this system that might explain this,” says Murray.

Genetic counselling

Apart from the genetic contribution, we also know that the developmental environment plays a very important role. Many people observe anger while growing up – it was thus part of their developmental environment. For them, it is appropriate behaviour in specific situations.

To understand this contribution from the developmental environment, a background in psychology is necessary. The undergraduate degree in Behavioural Genetics at the UFS has Genetics and Psychology as majors, and this is where the link to genetic counselling comes in.

Murray explains that genetic counselling is a field in medical sciences focusing on helping patients affected by medical conditions to understand the underlying genetics. For individuals with a family history of genetic conditions (such as specific cancers) or pregnant mothers with foetuses affected by genetic abnormalities (such as Down syndrome), the services of a genetic counsellor are invaluable. A genetic counsellor will help these individuals understand the cause of the disorder, how it was diagnosed, what the symptoms are, what the progression will look like, if any treatment is available, and what the possible options are (if any) for alternatives.

Genetic counsellors need a strong background in both Genetics and Psychology. To become a registered genetic counsellor, a student completes a BSc degree in Biological Sciences (Behavioural Genetics at the UFS would be ideal). Thereafter an honours degree in either Genetics or Psychology (though Genetics is preferable). The student can then apply at either the University of the Witwatersrand or the University of Cape Town for a master’s degree in Genetic Counselling. This entails two years of study, followed by two years of practical internship. Only after this you will be able to register with the Health Professions Council of South Africa (HPCSA) as a genetic counsellor.

Students studying Behavioural Genetics at the UFS are off to a great start. Murray’s teaching philosophy is to always strive to deliver students who are better than she is. “I can only really do this by sharing my passion for my research. I hope to inspire my students to also always be hungrily curious, to always question, and to find the joy in knowledge and learning.”

News Archive

UFS receives multimillion rand international funding for Advancement

2013-01-21

21 January 2013

We are one of four South African universities that have been selected to take part in a multimillion-rand programme to bolster private fund-raising and Advancement efforts.

The UFS will receive US$640 000 (R5 612 800) over a period of five years to use in advancement efforts.

In total, the US-based Kresge Foundation will make US$2.5 million available to the four universities, which includes the UFS, Durban University of Technology (DUT), Tshwane University of Technology (TUT) and the University of Johannesburg (UJ), over the next five years as part of a joint initiative with Inyathelo: The South African Institute for Advancement, to support the long-term financial sustainability of higher education institutions in South Africa.

Kresge will also provide programmes and support aimed at enhancing student access to universities and improving graduation rates.

Bill Moses, who directs Kresge’s education programme, says declining government support means that South African university officials need to tap into diversified philanthropic and private funding if they want to enhance their institutions’ ability to serve students better. “Stronger Advancement skills are critical to their success and ultimately to getting more South African students into universities and completing degrees. Advancement is not just about raising funds. It is the practice of building, maintaining and improving support, skills and other resources to ensure the sustainability of an institution,” explains Moses.

This latest Kresge initiative follows the success of a five-year partnership with Inyathelo that helped five high-profile South African institutions - the University of the Witwatersrand (Wits); the University of Pretoria (UP); the University of the Western Cape (UWC); the Cape Peninsula University of Technology (CPUT) and the Children’s Hospital Trust - increase their private fund-raising revenue threefold. The four universities will receive additional funding over the next five years and will serve as mentors to the new group of institutions.

In April last year, Kresge announced a new commitment to South African higher education that builds on its efforts in the United States to improve university access and help students succeed academically. Their ‘Promoting access and success at South African universities’ programme will seek to strengthen pathways to and through universities, especially for students who are often unprepared for university study. Moses says enhancing the ability of universities in South Africa to graduate the next generation of knowledge workers, will make it possible for the country to compete more effectively in the global economy. “Access to higher education in South Africa has improved dramatically since the end of Apartheid. A doubling of enrolment since 1994 has, however, contributed to serious challenges, including under-prepared students and disappointing graduation rates. We are confident that our programme will help address some of these obstacles to success,” says Moses.

Kresge has already funded several efforts that support its interest in strengthening pathways to and through universities this year, including a grant to the University of the Free State to expand the South African Survey of Student Engagement, as well as funding to the University of Pretoria to support a conference in January, which will highlight opportunities to promote access and success at South African universities.

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