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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

“You cannot find Ubuntu in a culture of dominance” – Dr Mamphela Ramphele during second Leah Tutu Gender Symposium

2015-02-28

From the left are: Samantha van Schalkwyk, Zanele Mbeki, Prof Pumla Gobodo-Madikizela and Dr Mamphela Ramphele.
Photo: Johan Roux

Video message from Mrs Leah Tutu

Session 1: Keynote address by Dr Mamphela Ramphele
Ndiyindoda! Yes, you are a man

Session 2: Professor Robert Morrell from the University of Cape Town
South African Gender Studies: Setting the context

Session 3: How can we engage young men to act against violence against women?
Panel discussion by Lisa Vetten (Wits Institute for Social and Economic Research), Despina Learmonth (Psychology Department, University of Cape Town) and Wessel van den Berg (Sonke Gender Justice)

Session 4: Professor Pumla Gobodo-Madikizela
Self-defence as a strategy for women’s resistance: Reflections on the work of Susan Brison

Engaging men to act against gender-based violence in the Southern African context.

This was the theme of the second International Leah Tutu Symposium, hosted by the Gender Initiative of Trauma, Forgiveness and Reconciliation Studies of the University of the Free State (UFS) on Tuesday 24 February 2015.

What does it mean to be man? How can men become active in the fight against gender-based violence? And when does one say: enough is enough? Questions like these set the tone as highly-respected individuals such as Dr Mamphela Ramphele, Prof Rob Morrell, Lisa Vetten and Andy Kawa took to the stage in the Odeion on the Bloemfontein Campus.

Leah Tutu
Unfortunately, Mrs Leah Tutu could not attend this year’s event, but she still managed to send sparks of wit and insight into the auditorium. In her video message, Mrs Tutu referred to the fact that our country has “consigned discriminatory legislation to the rubbish bin of the past”, but we continue to inhabit a divided society.

“We have a constitution and bill of rights that should have sounded the death knell for patriarchy. But women are unsafe across the land,” Mrs Tutu said. “Our freedom cost too much to be left out in the rain,” she urged.

Ndiyindoda! Yes, you are a man
In Dr Ramphele’s keynote address, “Ndiyindoda! Yes, you are a man”, she scrutinised the dominant masculinity model that has supported an alpha-male mentality for millennia. A mentality that celebrates dominance, power and control – where the winner takes it all. How then, can we expect our young boys to embrace the value system of a human rights culture?

“Gender equality is at the heart of our constitutional democratic values. Yet, our society continues to privilege and celebrate the alpha male as a masculinity model,” Dr Ramphele said. This dissonance can only produce conflict and violence.

We encourage our young men to be gentle, communicative, caring people who show their emotions. And when they do, what do we as women do? Do we encourage them?

“Or do we join those who call them wimps, moffies, sissies? How do we respond when they are ridiculed?” Dr Ramphele asked. Are we, as mothers, fathers and grandparents willing to socialise our children to acknowledge a diversity of masculinities as equally valid in our society?

The new man and the new woman of the 21st century need to be liberated from the conflict-ridden dominant masculinity model. They need to be able to shape their identity in line with a value system of human rights as enshrined in our constitution.

Perhaps Dr Ramphele’s message could be summed up by one sentence: You cannot find Ubuntu in a culture of dominance.

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