Sep 19, 2017

Scientists pinpoint genes behind butterfly wing patterns

Passion butterfly wing pattern produced by gene editing. Image: Proceedings of the National Academy of Sciences (PNAS)

Via two different gene editing studies, scientists have found that the intricate colors and patterns of butterfly wings develop thanks to just two genes, per Nature.

  • The technique: The research teams used the CRISPR gene editing technique to "turn off" two separate genes — called WntA and optix — to observe the results on the wings of several butterfly species.
  • The results: The WntA gene was found to set borders for the patterns on butterflies' wings as turning it off led colors to bleed together and fade. And the optix gene seemed to do more than just control colors, turning some individuals black or grey while creating iridescence in other butterflies, indicating that the genes also influence the architecture of the wings.
  • Why it matters: The results show how gene editing techniques can be used to discover more about evolution in a laboratory setting.

Go deeper

George Floyd updates

Protesters gather north of Lafayette Square near the White House during a demonstration against racism and police brutality, in Washington, D.C. on Saturday evening. Photo: Jose Luis Magana/AFP via Getty Images

Tens of thousands of demonstrators have been rallying in cities across the U.S. and around the world to protest the killing of George Floyd. Huge crowds assembled in Washington, D.C., Philadelphia and Chicago for full-day events on Saturday.

Why it matters: Twelve days of nationwide protest in the U.S. has built pressure for states to make changes on what kind of force law enforcement can use on civilians and prompted officials to review police conduct. A memorial service was held for Floyd in Raeford, North Carolina, near where he was born. Gov. Roy Cooper ordered all flags to fly at half-staff to honor him until sunset.

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 11:30 p.m. ET: 6,889,889 — Total deaths: 399,642 — Total recoveries — 3,085,326Map.
  2. U.S.: Total confirmed cases as of 11:30 p.m. ET: 1,920,061 — Total deaths: 109,802 — Total recoveries: 500,849 — Total tested: 19,778,873Map.
  3. Public health: Why the pandemic is hitting minorities harder — Coronavirus curve rises in FloridaHow racism threatens the response to the pandemic Some people are drinking and inhaling cleaning products in attempt to fight the virus.
  4. Tech: The pandemic is accelerating next-generation disease diagnostics — Robotics looks to copy software-as-a-service model.
  5. Business: Budgets busted by coronavirus make it harder for cities to address inequality Sports, film production in California to resume June 12 after 3-month hiatus.
  6. Education: Students and teachers flunked remote learning.
Updated 5 hours ago - World

In photos: People around the world rally against racism

Despite a ban on large gatherings implemented in response to the coronavirus pandemic, protesters rally against racism in front of the American Embassy in Paris on June 6. Photo: Julien Mattia/Anadolu Agency via Getty Images

Tens of thousands of people have continued to rally in cities across the world against racism and show their support this week for U.S. demonstrators protesting the death in police custody of George Floyd.

Why it matters: The tense situation in the U.S. has brought the discussion of racism and discrimination onto the global stage at a time when most of the world is consumed by the novel coronavirus.