Summary
Geneticists Jan and Alex from Oxford present a captivating discussion on the evolutionary significance of animal adaptations, highlighted by their appearance at a festival with a three-meter snake. They explore how certain species, like snakes and vampire bats, have evolved to perceive infrared light, showcasing the remarkable adaptability of genes. This leads to a broader conversation about the human genome, revealing that humans possess a similar number of genes as simpler organisms like fruit flies and worms, challenging previous assumptions about genetic complexity.
The conversation shifts to the vast amounts of non-coding DNA within genomes, which play crucial roles beyond mere genetic instructions. Jan and Alex emphasize that much of this "dark genome" is involved in regulating gene expression and timing, suggesting that it is far from being "junk DNA." They also delve into the evolutionary history of mitochondria, which once functioned as independent organisms before becoming integral to cellular function, highlighting the intricate interplay between different genetic elements and the environment.
As they conclude, Jan and Alex stress the importance of hypothesis-driven research in genetics, cautioning against the pitfalls of accumulating data without clear questions. They express excitement about the future of genomic research, anticipating that the next generation of scientists will uncover even more about the complexities of biology and evolution.
Show Notes
Chloroplasts in plant cells and mitochondria in animal cells were once free-living organisms. Now they are organelles fully incorporated in animal and plant cells. So how did this merging take place and how was outside DNA accepted and come to play a vital role in the operation of plant and animal cells? Yan Wong and Alexandra Martin-Geary presented some of these fascinating ideas and the big questions in genetics at this year’s British Science Festival in Southampton.
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Across south-eastern Australia, bogong moths seem to be everywhere. A few years ago, it was a different picture: scientists witnessed a population crash, and habitat threats put the species on the IUCN Red List. Are we seeing a bogong bounce-back? Jonathan Webb speaks to Dr Kate Umbers about these incredible critters, the many unsolved mysteries of their lives — and what their future could look like. You can binge more episodes of the Lab Notes podcast with science editor and presenter Jonathan Webb on the ABC Listen app (Australia). You'll find episodes on animal behaviour, human health, space exploration and so much more. Get in touch with us: [email protected] Featuring: Associate Professor Kate Umbers, Western Sydney University Further information: iNaturalist Bogong watch Bogong watch project This episode of Lab Notes was produced on the lands of the Gadigal, Ngunnawal and Ngambri people.