All posts tagged with pigmentation

Probing ancient pheomelanin

3 minute read

Living organisms create spatial patterns of trace elements in their bodies. Clever means of detecting those spatial patterns are arriving. These have given n...

Zebra stripes and flies

1 minute read

A fun story by Ed Yong in The Atlantic looks at an experiment that put horses in zebra suits to test whether the stripes confound biting flies: “The Surprisi...

Chemical effects of pigmentation variation

2 minute read

I lectured on pigmentation in my introductory class this week, and this recent news story is relevant: “Redheads may be at higher risk of melanoma even witho...

The Neandertal pigmentation race

1 minute read

As regular readers know, I’ve been detailing some of our work on the pigmentation genes of Neandertal and Denisova genomes. I got interrupted in the middle o...

Anthropology 105, lecture 7: Eyes

1 minute read

Out of all the lectures in the course, this was one of my favorites to put together. I return to the topic of evolutionary developmental biology, first raise...

Anthropology 105, lecture 7: Eyes

1 minute read

Out of all the lectures in the course, this was one of my favorites to put together. I return to the topic of evolutionary developmental biology, first raise...

Measuring population subdivision

1 minute read

The basic measure of genetic difference between two populations is the statistic, FST. In genetics, the term F generally stands for ``inbreeding’’, which ten...

Why do people differ in skin color?

7 minute read

The color of human skin is determined by the amount of two pigments, eumelanin and pheomelanin. These pigments are the basic ones underlying all kinds of col...

Eye pigmentation and allele frequencies

3 minute read

Eye pigmentation in humans varies along a spectrum of colors from dark brown, through lighter brown, hazel, and green, to light blue. These differences are c...

Violet eyes

1 minute read

Oh, I suppose I should go ahead and link to that Elizabeth Taylor mutation article:

Denisovans did not have red hair

6 minute read

At least, the Denisova sequence does not have any of the variants in humans that are associated with red hair. Nor does it share the unique Neandertal varian...

Quote: Boyd on New World pigmentation clines

5 minute read

I’m using some statistics out of William Boyd’s 1956 printing of Genetics and the Races of ManBoyd:1956. It gives a good accounting of blood group data known...

Mailbag: Neandertal colors

1 minute read

Regarding that cool new app from Apple/Smithsonian... I know it's really all just for fun, but seeing that there is only one Neandertal face for everyone to ...

Pigment controller OCA2

less than 1 minute read

Razib: “OCA2 makes East Asians white and Europeans blue.”He discusses a study out of Esteban Parra’s lab in PLoS Genetics (open access), which characterizes ...

Lizard whitening

less than 1 minute read

Ed Yong reports on a study of pigmentation evolution in the lizards of White Sands, New Mexico: “Three desert lizards evolve white skins through different mu...

Cichlid colors

3 minute read

I really can’t get over how much work went into the cichlid pigmentation paper that’s out in the current Science (Roberts et al. 2009). The paper examines th...

The colors of mice

2 minute read

Science this week features an article by Elizabeth Pennisi about the research of evolutionary biologist Hopi Hoekstra. She studies pigment variations in wild...

A horse of a different color

4 minute read

I feel like I’ve been transported into the future to see what science will be like fifteen years from now:

Bottle gray

2 minute read

According to this press release, gray hair in aging people is the result of a hydrogen peroxide metabolism gone haywire: