Alisa

Occidental College Class of 2022 ~ Biology Major

[Alisa @alisaditt]

Researchers reconstruct the face of a Cro-Magnon man, who suffered from a genetic disease called Neurofibromatosis. After re-examining his remains they decided to create a more realistic model covered in tumours. @OxyEvo https://t.co/DpVYegkOZ6

[Alisa @alisaditt]

These sympatric Heliconius butterfly populations exhibit strong prezygotic isolation and produce hybrids that are fertile. Whereas, when the allopatric populations mate freely in captivity they produce female hybrids that are sterile. @OxyEvo https://t.co/cFwsUNE2ru

[Alisa @alisaditt]

Tibetans have a unique version of the EPAS1 gene that reduces levels of hemoglobin and protects against altitude sickness. This article suggests this version of the EPAS1 gene is almost identical to that of the Denisovans. @OxyEvo https://t.co/G6FtUqqtTD

[Alisa @alisaditt]

Researchers claim that pelvis shape has become variable over time through random genetic variations rather than environmental changes. This article supports the idea that evolution is not a perfect process. ⁦@OxyEvo⁩ https://t.co/J3pqeYTuL2

[Alisa @alisaditt]

Researchers have found that microbes evolve and adapt to their unique hosts and they are less beneficial to hosts of other genotypes. This suggests that there is not a universally healthy microbiome. ⁦@OxyEvo⁩ https://t.co/lAtJDGdXMp

[Alisa @alisaditt]

After combining genetic and physical differences of gentoo penguins, scientists think they should be classified as four separate species. This will help conservation efforts because it will be easier to monitor declines. ⁦⁦⁦@OxyEvo⁩ https://t.co/52K0WVolEZ

[Alisa @alisaditt]

This article shows many interesting and shocking examples of animal mating rituals. My favorite was the male Humpback whale, who sings in large groups to attract females. ⁦@OxyEvo⁩ https://t.co/VKIUfdtVgt

[Alisa @alisaditt]

Scientists discover that the CB1R receptor in adult mice displays a sexually dimorphic pattern in multiple regions of the brain. ⁦@OxyEvo⁩ https://t.co/wsI2X8juMj

[Margot Murphy @Margot_B_Murphy]

@alisaditt @OxyEvo More neurotoxins were recently discovered in Cone Snails in the Schulz lab that could potentially reveal more of their evolutionary history! These snails have an even faster prey strike than snakes, but use similar harpoon-like teeth to deliver their venom. @OxyEvo

[Alisa @alisaditt]

Similar to snake venom, tropical marine cone snails have toxins that have evolved through continuous gene duplications over the past 11 million years. ⁦@OxyEvo⁩ https://t.co/YgnqQoWBiR

[Alisa @alisaditt]

This article shows how complex traits evolve using co-ordinated expression of many transcription factors and signaling pathways of existing genes. ⁦@OxyEvo⁩ https://t.co/kpiL49Gy8k

[Selah Wilson @selah_wilson]

@alisaditt @OxyEvo This looks very interesting! Thanks!

[Maya @MayaRicardo_]

@alisaditt @OxyEvo woah super cool! 🤯

[Alisa @alisaditt]

Rare hybridization events between species increases additive genetic variance and creates new colors, shapes and behaviors. This article shows a couple of interesting examples of hybrid species @OxyEvo https://t.co/osPM504rSK

[Alisa @alisaditt]

Microevolution of pigeon lice is studied by transferring lice to different colored pigeons to create different environments. The lice colors formed by microevolution were similar to the colors caused by macroevolution. ⁦@OxyEvo⁩ https://t.co/CkL9fea6Ka

[Alisa @alisaditt]

An example of directional selection between Riparian Tree species on the Hawaii Island. ⁦@OxyEvo⁩ https://t.co/cCeccfFV1N

[Alisa @alisaditt]

Gene flow between closely related species is more common than previously thought. Occasional hybridization between the cactus finch and ground finch have created a convergent beak shape. ⁦@OxyEvo⁩ https://t.co/XecVczXtXW

[Noa Carlson @carlson_noa]

@alisaditt @OxyEvo I wonder what is preventing the other two-thirds of the Southern killer whale population from breeding?? Perhaps there is a way conservational geneticist could help facilitate the breeding of the non-breeding whales 😄🐋

[Alisa @alisaditt]

Multi-drug resistant strains of Escherichia coli are evolving under negative frequency-dependent selection. This system shapes the population of E. coli., preventing MDR clones from rising to fixation. ⁦⁦@OxyEvo⁩ https://t.co/yT7sgIpAHl

[Alisa @alisaditt]

Inbreeding among endangered killer whales is driving down diversity and chances of survival. Only one-third of the Southern population is breeding, and two male whales are responsible for more than half of the calves born since 1990! ⁦⁦@OxyEvo⁩ https://t.co/bYtoIbCXiO