DNA, or deoxyribonucleic acid, is the code for human life contained in cells. This code contains genes which are expressed when a cell divides or grows. That expressed code is fired off to create unique human (or other beings).
Every cell in a human body (or other life-form) has an exact copy of the same DNA in it’s nucleus. That DNA contains the genes that hold the “code” for how to build a given organism out of cells and proteins. The difference between cells is the difference between what genes are expressed when a cell grows or divides. All human cells start from one cell, the fertilized egg of a mother. This contains 1/2 fathers DNA and 1/2 mothers to create DNA unique to the child.
That fertilized egg cells splits, genes are expressed and turned into RNA, RNA is read by ribosomes, ribosomes create proteins out of building blocks called amino acids, proteins are the primary things a body uses to actively function.
Factoids tagged with "DNA"
Flamingos are born with gray feathers. They become pink over time due to their aquatic diet of organisms like shrimp and red algae which are high in pigments called carotenoids.
The Court of Arbitration for Sport (CAS) ruled that athletes can determine their own sex in international sports like the Olympics.
Studies have shown there is no single determinant of sex, gender, or sexuality. Thus, a binary distinction of “male or female” fails to describe a wide range of humans in practice.
Nettie Stevens and Edmund Beecher Wilson independently discovered the chromosomal XY sex-determination system (that males have XY and females have XX sex chromosomes).
Water bears (tardigrades) are the only known animals to survive the vacuum of space. Water bears are extremophiles, meaning that they can survive extreme conditions (like high temperatures, and high pressure).