The sequences ranged from 45.2 million to 84.9 million base pairs in length, and taken together, they show that the Y chromosome has substantially diversified in its size and structure over this time.

The human Y chromosome, ... In the last 300 million years, it has lost 1393 of its original 1438 genes, and at this rate it will lose the last 45 in a mere 10 million years.

STUDIES of human chromosomes have been greatly facilitated by the development of newer technics, ... besides the usual 45-chromosome XO cells, many 46-chromosome XX cells occurred.

“Now that we have this 100 percent complete sequence of the Y chromosome, we can identify and explore numerous genetic variations that could be impacting human traits and disease in a way that ...

Trisomy is a genetic condition characterized by the presence of an extra chromosome. This means that the affected person has ...

Of note is the striking variation in size and structure across the 43 Y chromosomes sequenced that covered 180,000 years of human evolution and range from 45.2 million to 84.9 million base pairs ...

The human X chromosome has a unique biology that was shaped by its evolution as the sex chromosome shared by males and females. We have determined 99.3% of the euchromatic sequence of the X ...

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 ...

But the X chromosome is just the beginning. There are 23 other chromosomes left, and the project plans to map them all by the end of 2020. In doing so, we may soon have a complete human genome ...

It turns out that chromosome 2, which is unique to the human lineage of evolution, emerged as a result of the head-to-head fusion of two ancestral chromosomes that remain separate in other primates.

Extending noninvasive prenatal screening to all 24 human chromosomes can detect genetic disorders that may explain miscarriage and abnormalities during ... In the U.S. cohort, 328 (0.45 percent) ...