HS-LS3-1
Ask questions to clarify relationships about the role of DNA and chromosomes in coding the instructions for characteristic traits passed from parents to offspring.
- Animals
DNA tells tale of how cats conquered the world
Ancient DNA study suggests that domesticated cats spread across the ancient world in two waves.
- Archaeology
DNA from African mummies tie these folk to Middle Easterners
Ancient DNA extracted from 90 Egyptian mummies reveals genetic links to Greece and the Middle East.
- Genetics
Cool Jobs: New tools to solve crimes
Future investigators may identify criminals by the microbes they leave behind or by using DNA-like evidence from strands of their hair.
- Genetics
Scientists Say: Chromosome
This threadlike structure is made of DNA wrapped around protein. It allows the 3 billion base pairs in human DNA to stay neatly packaged in a cell.
- Science & Society
Fossils point to Neandertal diets — and medicine use
Whether Neandertals were largely meat-eaters or vegans depended on their environment, fossils now suggest. Their teeth also indicate they used natural medicines.
- Genetics
How to make a ‘three-parent’ baby
Scientists combined an egg, sperm and some donor DNA: The end result: what appears to be healthy babies.
- Genetics
Explainer: How PCR works
The polymerase chain reaction, or PCR, is like a DNA-copying machine. It duplicates genetic material over and over. Here’s how.
- Agriculture
World’s tallest corn towers nearly 14 meters
Short nights and a genetic tweak helped novel corn reach record heights.
- Animals
Tasmanian devils begin to resist infectious cancer
A deadly contagious cancer is spreading among Tasmanian devils. But the animals are evolving resistance, a new study finds.
- Health & Medicine
Grandparents’ diet could be a weighty issue for grandkids
Australian scientists have found that fat mice can pass on a heightened risk of obesity to their sons and grandsons.
- Genetics
Explainer: What is epigenetics?
Epigenetics is the study of molecular “switches” that turn genes on and off. Tweak those switches and there could be big health consequences.
- Agriculture
The first farmers were two groups, not one
The humans that began farming 10,000 years ago in the Fertile Crescent may have been two cultures living side-by-side.
