These new combinations result from the exchange of DNA between paired chromosomes ... There are now two cells, and each cell contains half the number of chromosomes as the parent cell.

Each of us has enough DNA to reach from here to the sun and back, more than 300 times. How is all of that DNA packaged so tightly into chromosomes and squeezed into a tiny nucleus? Histones are a ...

Researchers at the Crick have uncovered which genes on the Y chromosome regulate the development of sperm and impact fertility in male mice. This research could help us understand why some men don’t ...

Researchers at the Crick have uncovered which genes on the Y chromosome regulate the development of sperm and impact ...

In normal mammalian cells, a small telomeric DNA segment is lost after each cell ... 72 hours Measures shortest telomere length Adequate number of metaphase cells required for analysis Single telomere ...

Researchers say study represents a resource that could also help to dissect Y-gene functions in other tissues.

The X chromosome ... each cell undergoes a process known as “silencing” during the embryonic development stage in females. A lengthy RNA molecule, known as Xist, which is closely related to ...

Mitochondria are tiny structures that help cells in a number of ways ... By contrast, each cell contains only a single set of nuclear DNA (46 chromosomes), which is made up of 3,000,000,000 ...

The fossilized chromosomes ... C that allows them to detect which sections of DNA are likely to be in close spatial proximity and interact with each other in their natural state in the nucleus.

Watson and Crick discovered that the DNA we each carry while strutting around consists of two intertwined, twisted spirals of chemical compounds – a structure commonly described as a double helix.

In sexual reproduction—the way most life-forms procreate—each parent provides half an offspring’s chromosomes. Over generations, this mating and procreating shuffles the DNA deck ...