A Genetic Approach to Improving Hop Varieties

Some hops on the palm of a man's hand

Broadcaster: BBC One
Year: 2024
Genre: News package
Duration: 3 minutes
URL: https://learningonscreen.ac.uk/ondemand/index.php/clip/251624

This is a short piece from BBC news presented by veteran science reporter Pallab Ghosh, in which we investigates the state of play in the brewing industry. Specifically, Pallab discusses the ways that climate change is causing issues with the growth of hops, a crucial component in the manufacture of a pint of bitter. Interviews are conducted with scientists who are seeking to use molecular genetics to identify strains that will be good to cross-breed with existing varieties in order to hit the sweet spot of a hop that will grow well in warmer and dryer weather whilst delivering a great taste to the beer.

The clip might be useful for student of genetics and/or plant science.

A transcript of the package is available here.

At the time of writing, this story is also being reported on the BBC website: Fears for the future of the great British pint of beer.

The Gift: Getting more than you bargained from a genetic test?

Graphics for the BBC Radio 4 series "The Gift" showing a double helix and graphic of a DNA test kit.

Broadcaster: BBC Radio4
Year: 2023-24
Genre: Documentary, Factual
Duration: Seven 28 minutes episodes

Personal genetic tests have become a popular present to give to relatives. These are often taken quite lightheartedly – a chance to see how “Viking you are” or to investigate geographical origins. As this series researched and presented by Jenny Kleeman demonstrates, however, there can be rather more at stake than meets the eye.

The original series of six episodes was broadcast in 2023. A seventh episode was added in February 2024, after it had been revealed that popular service 23andMe had experienced a very significant data breach.

Episode 1: Fraud https://learningonscreen.ac.uk/ondemand/index.php/clip/241406
A DNA test given as a present reveals a scandal

Episode 2: Justice https://learningonscreen.ac.uk/ondemand/index.php/clip/251663
A son’s quest to find out more about his late father leads to information about a shocking crime

Episode 3: Mistakes https://learningonscreen.ac.uk/ondemand/index.php/clip/251664
Did a fertility clinic accidentally muddle up samples from two couples?

Episode 4: Race https://learningonscreen.ac.uk/ondemand/index.php/clip/251665
A home genetic test user discovers their racial identity isn’t what they thought

Episode 5: Health https://learningonscreen.ac.uk/ondemand/index.php/clip/251666
What happens if a genetic test reveals some unwelcome news about your future health?

Episode 6: Secrets https://learningonscreen.ac.uk/ondemand/index.php/clip/251667
A genetic test brings family relationships into doubt

Episode 7: Hacked https://learningonscreen.ac.uk/ondemand/index.php/clip/251668
A bonus episode, triggered by the news that 23andMe had been hacked and genetic data about millions of customers made available on the dark web.

At the time of writing, all episodes are available on BBC Sounds.

Dolly the Sheep: her place in history

Broadcaster: BBC Scotland/ BBC Two
Year: 2021
Genre: Documentary, Factual
Duration: 59 minutes
URL: https://learningonscreen.ac.uk/ondemand/index.php/clip/210031

Dolly the Sheep was born on 5th July 1996. She stands as a pivotal breakthrough in cell biology, the first mammal cloned from an adult somatic cell (not, as is sometimes mistakenly thought, the first cloned mammal per se). The BBC took the opportunity of the 25th anniversary to put on record a “behind the scenes story… told in depth for the first time by the scientists who created her“.

In keeping with that description, the programme is principally structured around a combination of recent and archive interviews with various members of the Roslin Institute team involved in the generation of Dolly. The Dolly research itself is presented in the context of the shift from Roslin as an agricultural research facility, to a centre conducting more biomedically-orientated, ‘translational’ research. As such, I think the documentary serves best as an artefact for study of the Sociology of Science or the History of Molecular Biology.

Continue reading

Home Genetic Testing: When a Christmas present uncovers a concealed past

Broadcaster: BBC Radio4
Year: 2021
Genre: Documentary, Factual
Duration: 37 minutes
URL: https://learningonscreen.ac.uk/ondemand/index.php/clip/210656

[warning: contains spoilers] One of the features of recent Christmases has been the rise of the Home genetic test (aka Direct-to-Consumer (DTC) genetic test) as a gift. I recently had cause to research various DTC genetic service websites in order to update a talk – the number of Black Friday/Cyber Monday/Christmas adverts this prompted on my Facebook feed was genuinely alarming.

The radio documentary A Family of Strangers, produced and presented by David Read, starts with us being introduced to Philip and his wife Jill who received home testing kits as Christmas presents from their elder son in 2018. When Philip’s result came through, he was surprised to see that he was 50% Ashkenazi Jew, despite having grown up in East Anglia and having no knowledge of such heritage.

Jill pondered whether Philip might have been adopted, but he was convinced he couldn’t be – there were pictures of him with his parents as a baby, and he shared both physical characteristics and mannerisms with an elder brother. They couldn’t envisage Philip’s mother having an affair, certainly not with the same man for long enough to have fathered two children!

Continue reading

Genetics and the longer arm of the law

Broadcaster: BBC Radio4
Year: 2021
Genre: Documentary, Factual
Duration: 37 minutes
URL: https://learningonscreen.ac.uk/ondemand/index.php/clip/202870

In this fascinating radio documentary, Professor Turi King, looks at the growing role of genetic evidence in criminal justice. Starting from the invention of Genetic Fingerprinting in 1984, the episode moves on to discuss the emergence of Genetic Genealogy and latterly Forensic Phenotyping in criminal cases. We have previously considered the history of DNA Fingerprinting in significant detail on this site (e.g. see this post), so this entry will focus on the more recent development.

The UK established a National DNA database (NDNAD) in 1995. Initially there was little controversy about this measure, however changes in the law about criteria for inclusion led to growing unease. In 2001, the Forensic Science Service introduced Familial Searching, enabling you to interrogate the existing records (which have, at times, included as many as 6 million people) for close relatives, allowing police to home in on a suspect. An early case involved Craig Harman, who was found guilty of manslaughter when he dropped a brick through a lorry window, killing the driver (see this report).

A number of records of innocent people were purged from the NDNAD, following a successful challenge in 2008 regarding infringement of privacy and personal data. In the interim, however, there has been a dramatic fall in the price of genome sequencing, and the rise in “direct to consumer” DTC genetic testing companies, such as Ancestry and 23andMe. This has allowed the emergence of private citizens acting as Genetic Genealogists and offering advice on potential suspects to police forces.

The programme includes an interview with Colleen Fitzpatrick, described as the “Mother of Genetic Genealogy”. In 2014, she exploited the correlation between family names (inherited via the male line in many cultures) with analysis of the STR locus on the Y chromosome (which only men usually possess). In this way, she was able to suggest to police in Phoenix, Arizona that the perpetrator of a decade-old unsolved murder almost certainly had the surname Miller.

More recently, there was success and controversy when it transpired that police had uploaded crime scene samples to the FamilyTreeDNA database to identify the notorious Golden State Killer (details here). This was a massive breakthrough, but users of such genealogical DNA services were divided as to the potential infringement of their civil liberties given that this was not their expectation when they has signed up.

Having kept a reasonably keen eye on the field over the years, I was familiar with the story up until this point. There were, however, a couple of other recent developments towards the end of the episode that were new to me.

The first was the use of DNA databases to catch up with sex tourist abusers of women and children in low and middle income countries, or children abandoned by aid workers in countries they were supposed to be helping. The principle is the same as that used in catching the Golden State Killer and in related cases. The specific example was given of the agency Hear Their Cries, which works to identify people who have committed rape and/or abandoned children in the Philippines.

Lastly, there was discussion of forensic phenotyping, where genetic information about facial features and other physical characteristics are used to generate virtual photofits or reveal other clues about a suspect. Parabon was specifically named as a company working in this field.

This programme would offer useful background for anyone interested bioethical implications of genetic information in the contemporary world. I’d like to hear a follow-up show in which they investigate the uses and abuses of genetic evidence as a defence

Genetic Dreams, Genetic Nightmares


Matthew Cobb is Professor of Zoology at Manchester University, and author of several popular science books. He has produced a terrific three-part documentary Genetic Dreams, Genetic Nightmares on the potential and the risks of Genetic Modification (GM).

Each thirty minute episode takes us through a different phase in the first fifty years since the development of “genetic engineering”. Below I will give links to the episodes on BoB. Since, at the time of writing, they are also available on BBC Sounds I shall also cite those.

Episode 1 focuses on the origins of what became known as “recombinant DNA technology” and includes discussion of the famous 1974 conference in Asilomar, that introduced guidelines on safe research
Available on BoB: https://learningonscreen.ac.uk/ondemand/index.php/clip/201952
Also on BBC Sounds: https://tinyurl.com/GDGNe1

In Episode 2, attention turns to commercial uses of GM and the role of venture capitalists in starting the world of biotechnology. The controversy of GM crops is discussed. 
Available on BoB: https://learningonscreen.ac.uk/ondemand/index.php/clip/201953
Also on BBC Sounds: https://tinyurl.com/GDGNe2

In Episode 3, Cobb considers the new potential for genome editing, including the ability to alter the human genome.
Available on BoB: https://learningonscreen.ac.uk/ondemand/index.php/clip/201954
Also on BBC Sounds: https://tinyurl.com/GDGNe3

Pain, Pus and Poison

This 3-part series examined the history of modern medicine

This 3-part series examined the history of modern medicine

Broadcaster: BBC4

Year: repeated regularly (originally broadcast 2013)

Genre: Documentary, Factual

Review by Muzammil Khomusi

The three-part series Pain, Pus and Poison: The search for modern medicines, is a BBC and Open University co-production. Each episode takes one of the “P” words as it’s focus. Links:

In the opening sequence of Pain, Pus & Poison: The Search for Modern Medicines, Michael Mosley tells the story of the discovery of opium and the first instance of opium overdose. Whilst it has the flare for the dramatic, the exposition of this first episode plays quite thrillingly as Mosley ventures into the history of pain relief.

In the first episode Pain, Mosley explores the development of pharmaceutical pain relief. He talks about how Sertürner was the first to isolate morphine from opium and how he published a comprehensive paper on its isolation, crystal structure and pharmacological properties. Despite the fact this discovery did not catch people’s attention back in 1817, Mosley focuses on the self-experimentation done by this 19th century chemist. Once his paper was translated into French, the world became aware of one of the single most important discoveries in the field of (alkaloid) chemistry.

However, Mosley does not explore the psychological side effects of the drug in the first episode nor does he ponder the extent to which these discoveries shaped guidelines in healthcare systems the world over. Needless to say, pharmaceutical companies have since made many types of pain relief medication but Mosley fails to question how many of these drugs that relieve pain are actually in demand, and how many have just been by-products of trial and error.

As disgusting as thought of the word Pus may be, it’s a key component of our immune response. Mosley introduces this second episode by mentioning germ theory, which is unavoidable when talking about pus in the context of human physiology (and it overtook miasma theory which argued that diseases—such as cholera, chlamydia, or the Black Death—were caused by a miasma, a noxious form of “bad air”, also known as night air). However, he chooses first to tell the story about the French being intrigued by how some wine could go off and so, for the first third of the episode he explores the role of bacteria in making alcohol. This is an aspect of microbiology that is already fairly well-known and does not directly fit with the title of the episode.

Mosley never fails to build up one’s anticipation when he explores the historical context behind many of the scientific discoveries in this episode, and the trilogy in general. After he talks about Koch beating Pasteur to the discovery of microbes, he heavily focuses on the story of Penicillin. In a tale which is, again, well-known Fleming accidentally discovered Penicillin after returning home from a holiday and found that a green mould called Penicilium notatum had contaminated Petri dishes in his lab. Fleming is described as an ‘acute observer’. This may be rather generous, given the fortuitous events that led to the discovery, however he did need to be able to recognise the potential significance of the interaction. [It is true, though, that it needed the subsequent work of other scientists such as Howard Florey, Ernst Chain and Norman Heatley were involved in turning penicillin into a wonder drug – see Breaking the Mould for more details.]

In the final episode, Mosley spends little time on an elaborate introduction and delves straight into the history of Poison. He looks at the history of curare, or an equivalent muscle relaxant which has since revolutionised modern surgery. A line that stands out in this episode is that ‘all medicines are poison and all poisons must be regarded, to an extent, as potential medicines.’ Words to that effect lead seamlessly into Mosley describing the use of arsenic and how this component in rat poison would lead to changes in the law to control its administration. It goes without saying that since then, controlled amounts of poisons have actually been paramount in our understanding of selective toxicity and would see mustard gas, part of the chemist war (WWI) be used in part as the first chemotherapeutic treatment of patient JD. Though it [nitrogen mustard] was successful in managing the cancer, it was a little too late to save that patient, but after a preliminary reading of his medical notes at Yale University, Mosley assures us his last few months were the best he’d ever had.

Although this three-part program was easy to understand, it might be rather too easy in parts, with some of Mosley’s descriptions being borderline inaccurate. I feel he could have tailored it to an audience with a higher level of understanding of science and still not have lost the interest of a younger audience. Nevertheless, Pain, Pus and Poison is visually appealing, informative and well presented; I enjoyed it.

35 years of DNA fingerprinting: an overview of broadcast media

On the 7th March 1985 a research paper Hypervariable ‘minisatellite’ regions in human DNA by Alec Jeffreys, Victoria Wilson and Swee Lay Thein was published in the scientific journal Nature.

DNA1

Although the relatively unassuming title might not have immediately caught the attention of some readers, it is clear from the summary of the article that the authors were acutely aware of its potential significance. “A probe based on a tandem-repeat of the core sequence can detect many highly variable loci simultaneously” they wrote “and can provide an individual-specific DNA ‘fingerprint’ of general use in human genetic analysis.”

DNA2A second paper by the same authors, also in Nature, followed in July of that year. This time the title Individual-specific ‘fingerprints’ of human DNA demonstrated that the notion of Genetic Fingerprinting was front and centre.

The first uses of DNA fingerprinting were not in the kinds of criminal cases with which it is now most popularly associated, but rather with immigration and paternity cases in which family relationships were being disputed. The first use in a criminal case occurred in 1986, when the technique was used to exonerate a man who had falsely confessed to a murder committed locally. The following year, the real culprit was identified using DNA evidence.

The history and uses of DNA fingerprinting have regularly been covered on UK television and radio. The following list picks out some examples where the work of Alec Jeffreys and colleagues have been discussed.

UPDATE (10th March 2020): The 35th anniversary was itself the subject of some news coverage, eg BBC News at One on 6th March
https://learningonscreen.ac.uk/ondemand/index.php/clip/166899

 

Documentaries

Catching Britain’s Killers: The Crimes That Changed Us (2019) 
DNAmapThis hour-long documentary showed on BBC2 in October 2019 follows the development of DNA profiling from the murder of Lynda Mann in 1983 through to the establishment of a UK National DNA database in 1995 and the ongoing adoption of similar systems around the world. The programme picks up on the potential of DNA to solve crimes, but also touches on the ethical issues raised by the technology.
https://learningonscreen.ac.uk/ondemand/index.php/clip/165475 (60 minutes) Continue reading

The Gene Revolution: Changing Human Nature (Storyville)

CRISPRBroadcaster: BBC4

Year: 2020

Genre: Documentary

Duration: 90 minutes

URL: https://learningonscreen.ac.uk/ondemand/index.php/clip/163119

This is an exceptional documentary, and I do not say that lightly. An absolutely terrific introduction to the history and potential of CRISPR-based genome editing. A well-spent hour and a half for anyone interested in molecular biology at any stage of their career.

The programme is divided into six chapters and I have prepared a set of structured notes with associated questions. Available via this link.

storyville sheet

I have also prepared a transcript of the programme (this link).

At the time of writing (until 2020) the documentary is also available at https://www.bbc.co.uk/iplayer/episode/m000dt7d/storyville-the-gene-revolution-changing-human-nature

Cancer Genomics and the 100,000 Genomes Project (BBC Breakfast)

barwellBroadcaster: BBC1

Year: 2019

Genre: Studio interview

Duration:  7 minutes

URL: https://learningonscreen.ac.uk/ondemand/index.php/clip/153933

Genomics, the ability to sequence a person’s entire DNA (or at least a sizeable part of it), is starting to make radical changes to medicine, opening up the era of “stratified” or “personalised” treatment. A UK-wide initiative, the 100,000 genomes project, is looking to gather genomic data from a large number of people to uncover genes responsible for conditions, often factors that have not previously been identified.

One area in which this is making a particular impact is cancer genomics. On 27th September 2019, BBC Breakfast interviewed four sisters from Leicester, and Dr Julian Barwell, their clinical geneticist. Three of the sisters – Sandra, Mary and Kerry were diagnosed with breast cancer within a few months of each other. Via their sister Bethan they were put in touch with Dr Barwell. The sisters who had cancer were enrolled in the 100,000 genomes project and underwent Whole Genome Sequencing. Two of the three have a mutation in PALB2. Interestingly, Bethan does not, even though she does not currently have the disease). Conversely, Kerry does have the mutation, but has still had cancer – all of which serves to show that this remains a complex picture. The main hope now is for family members to employ preventative strategies to minimise their risk.

A press release about this research, including the role played by geneticists at the University of Leicester in unravelling the relevance of the mutations, is available via this link.

At the time of writing, the clip is also available on the BBC website via this link