"We need to know the functional fraction of the human genome in order to focus biomedical research on the parts that can be used to prevent and cure disease," he said. "There is no need to sequence ...

Only 2% of the DNA sequence in the human genome is used to make proteins, while the rest are noncoding DNA sequences without completely explained function, colloquially also known as junk DNA.

Fractions are the basis for most higher-level mathematics. Students need to master the numerical values in earlier grades to tackle topics like algebra later. There’s only one hitch: Fractions can ...