Many plants, and a few other organisms, can expedite diversification even further by doubling their number of chromosomes.

Researchers have uncovered a "selfish" X chromosome in the fruit fly Drosophila testacea that manages to distort inheritance ...

Vitamin D supplements may help prevent the loss of telomeres, DNA sequences that shrink with aging, a large study shows. But ...

There are now four daughter cells — two from each of the two cells that entered meiosis II — and each daughter cell has half the normal number of chromosomes (Figure 7). Each also contains new ...

And in the only case so far reported of an XYY with several children, the abnormality was not transmitted: an Oregon XYY has had six sons, but all have a normal XY pattern. * Chromosome patterns o ...

Instead of having two copies of each chromosome, as is typical for normal cells, the cancer cells had anywhere from one to as many as five or six copies; and sometimes there were parts of chromosomes ...

NIPT is most often used to screen for trisomy. Normal chromosomes come in pairs. When a baby has three copies of a particular chromosome, the condition is classified as a trisomy. NIPT is quite ...

Preliminary results of chromosome studies on cultured umbilical-cord-blood leukocytes from a consecutive series of 2159 infants born during a year indicated that gross chromosome abnormalities ...