Alix Leslie

Just keep swimming

[Alix Leslie @AlixLeslie1]

Shoutout to Mel Ginther! She’s awesome :) @mel_ginther

[Alix Leslie @AlixLeslie1]

Mutation + natural selection= evolutionary change. How natural selection determines which mutations die out and which mutations live on ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Each species has a beak specialized to take advantage of certain types of food resource ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Ecological speciation: when divergent natural selection is the driving force behind speciation, based on different habitats ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Sexual selection: isolated populations could form different traits or preferences somewhat randomly. Sexual traits are inherently linked to reproduction ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Coronavirus: origin from China with zoonotic spillover from bats (RaTG13) ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

How the fossil record impacts today’s climate change @OxyEvo https://t.co/aXOVzIIKUT

[Alix Leslie @AlixLeslie1]

There is far less DNA divergence among humans than among ape subspecies. No evidence for single dispersals to different areas and then isolation @OxyEvo

[Alix Leslie @AlixLeslie1]

Human phenotypic variation is continuous and clinal. Thus, the allele for light skin varies across a gradient ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Even though most genetic diversity is shared among populations, we can identify a geographic component of ancestry with high precision using millions of markers ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Biological species concept: members of a population are considered to be the same species if they can interbreed and produce fertile offspring ⁦⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Phylogenetic species concept: leads to more species splitting and species are defined as the most irreducible @OxyEvo

[Alix Leslie @AlixLeslie1]

How gene flow can induce genetic variation as natural selection drives populations apart (driving one allele towards fixation while other allele gets lost) @OxyEvo

[Alix Leslie @AlixLeslie1]

Asexual vs Sexual Reproduction: although sexual reproduction may be more costly due to the requirement in finding a mate, it can serve as the solution to accumulation of deleterious mutations and to rapidly changing environments @OxyEvo

[Alix Leslie @AlixLeslie1]

Sexual selection: while males tend to “chase” their mates to ensure reproductive success, females must decide if they are Mr. Right @OxyEvo

[Alix Leslie @AlixLeslie1]

From genes to traits: how genotype affects phenotype ⁦@OxyEvo⁩ https://t.co/J0639dAO6w

[Alix Leslie @AlixLeslie1]

The Adaptive Radiation of Darwin's Finches https://t.co/p3ReFxdbGa @OxyEvo

[Alix Leslie @AlixLeslie1]

Mutation + natural selection= evolutionary change. How natural selection determines which mutations die out and which mutations live on ⁦@OxyEvo⁩

[Alix Leslie @AlixLeslie1]

Genetic drift: when “lucky” genes move on to the next generation @OxyEvo

[Alix Leslie @AlixLeslie1]

Gene flow: flying from one population to another @OxyEvo