This determines how a particular trait will be expressed. A dominant allele requires only one copy for its trait to be expressed, while a recessive allele requires two.

Nectarines: There is a common misconception that nectarines are a cross between a plum and a peach, but that’s not at all the ...

From Washington, D.C., to Kathmandu and beyond, enormous crowds gathered to celebrate the LGBTQ community at Pride parades across the globe.

PHOTOS: ‘No Kings’ protest in Denver draws thousands Protests nationwide coincided with a military parade in Washington and President Donald Trump’s 79th birthday ...

Deadliest plane crashes of the last decade - In pictures The world has seen devastating air disasters over the years, claiming thousands of lives ...

Father's Day, celebrated on the third Sunday of June, honors fathers and their influence. Originating in 1909 with Sonora Smart Dodd, it's a time for ...

These photos show how summer vacation has changed over the last century. In the early 1900s, school used to be centered on crops, and summer wasn't a vacation — it was a time for hard work.

But if you have one allele for blue eyes and another for brown eyes, your eye color will be dictated by whichever allele is dominant. A dominant allele is one that always determines the phenotype when ...

As the Army parade festivities begin in the District, hundreds of demonstrators nationwide are crowding into streets Saturday to rally against Donald Trump.

See photos of the ‘No Kings’ protest in Sacramento, where over 5,000 people gathered at the California Capitol to oppose Trump administration policies.

Gabourey Sidibe gifts her husband Brandon permission to share the "funniest picture I've probably ever taken" in honor of Father's Day. The couple shares twins Cooper and Maya.