When and how were the first trans fats made with vegetable oil?

Artificial trans fat dates back to the early 1900s when German chemist Wilhelm Normann found that liquid vegetable or fish oils could be treated with hydrogen gas to make them solid or semi-solid.

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.