I’m really enjoying running on-line tuts with Schol Bio students, because the questions & discussions are so interesting. (So, hopefully the students enjoy them too!) Last week we got onto talking about the enzyme lactase and the fact that in some populations many individuals continue to produce it into adulthood (thus making them lactose-tolerant, & […]
Continue readingCategory: genetics
mastodons in greenland
What is a mastodon, anyway? Like mammoths (on the left in the image above), mastodons were common during the last ice age, but the two elephant-like creatures are fairly distant relatives. The more-familiar mammoths were close cousins of modern elephants (a fact that is of interest to those considering doing a Jurassic Park on mammoths – […]
Continue readingwhat is the “magneto” protein, & why are references to a 2016 paper suddenly in my feed?
A few days back an article in The Guardian popped up in my newsfeed. It was quite old – published in 2016 – but it looked interesting, so I read it & also tracked down the original paper. The article & research paper describe work done to develop and test a potential tool for unpicking […]
Continue readingsam bailey on isolating viruses, and why she is wrong
Recently I was told I needed to go to the Youtube channel of Dr Sam BaileyA and watch one of her videosB. So I did. This particular video is called The Truth About Virus Isolation, and yes it’s on Youtube, and no I’m not linking directly because I refuse to link to such a misleading […]
Continue readingwe haven’t taught critical thinking particularly well
Yesterday I got told to “do some research” &, by extension, to think critically. The biologist in me cringed a little when I read it (and not because of the advice about doing research). Biology teachers I know suggested that perhaps everyone should take the NCEA standard that lets students learn about the basic […]
Continue readingvaccines, viruses, & mRNA
Today I was told that the Pfizer-BioNTech vaccine (now approved for use in the US, UK, & Canada) is a virus (screencap at the bottom of this thread). It really isn’t, but I’ve seen this one several times & so I think it’s worth unpacking a little further. (You can also read about mRNA vaccines […]
Continue readingis it a shrimp? is it a prawn? no – it’s Super Crayfish! (revisited)
I wrote this post a couple of years ago, but I think it’s worth revisiting it. Why? Because these crayfish are in the news again – apparently they’ve “taken over” a Belgian cemetery (or, more correctly, the waterways in that cemetery). Local scientists believe that someone must have had the crustaceans in a home aquarium […]
Continue readingthe past, present, & future of orca in north america’s pacific northwest
n July this year, the Seattle Times ran a story on an orca called Tahlequah – she was pregnant, again. And just yesterday, she gave birth. The story is particularly noteworthy because a couple of years ago, Tahlequah also bore a calf, which died, and she then carried the dead baby on her nose for […]
Continue readingneandertals’ genetic legacy extends into africa
For the last few years it’s been pretty much received wisdom that African populations shared only a tiny proportion of their genes, if any, with Neanderthals. In contrast, other non-African sapiens populations had a small but significant admixture of Neanderthal genes. The underlying reason for this, it’s been assumed, is that Homo sapiens and neandertalensis only bred with […]
Continue readingzombie ants, updated
Image source: David P. Hughes, Maj-Britt Pontoppidan – http://www.plosone.org/article/showImageLarge.action?uri=info:doi/10.1371/journal.pone.0004835.g001 CC BY 2.5, https://commons.wikimedia.org/w/index.php?curid=17917778 Back in 2010 I wrote about the strange tale of the zombie ants, which do the bidding of their fungal overlords. (They’re not an isolated example; a range of parasites change their hosts’ behaviour. See here and here for example – though as you’ll find, […]
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