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 ...

The chromosome associated with male development, which is the last mysterious piece of the human genome, has been fully sequenced by a team of more than 100 researchers around the world, including ...

The Y chromosome, associated with the development of male sex characteristics, has been notoriously hard to sequence, as it contains lots of repeated DNA segments. (Image credit: Shutterstock ...

The first human genome was completed in April 2003, but it left behind some unknown gaps, including swathes of the Y chromosome. The chromosome’s repetition made it a challenge to reconstruct.

While all human chromosomes contain repeats, more than 30 million letters of the Y chromosome — out of 62.5 million — are repetitive sequences, sometimes called satellite DNA or junk DNA.

For decades, the Y chromosome — one of the two human sex chromosomes — has been notoriously challenging for the genomics community to sequence due to the complexity of its structure. Now, this elusive ...

The Y chromosome, which determines the sex of human and other mammal babies, is slowly degenerating and may disappear within a few million years, raising fears of extinction. However, a 2022 study ...

The human Y chromosome, responsible for determining male sex, finally has gotten an end-to-end examination. Researchers sequenced the chromosome, which contains many genes involved in sperm ...

For many years, the human Y chromosome was terra incognita. Scientists completed the genetic sequences of other chromosomes, the threadlike structures that hold an organism’s DNA.

Above, the sex chromosomes -- X and Y -- under the microscope. See all 23 pairs of human chromosomes under the microscope.

If you look at cells from a human or other mammal under a microscope, you’ll see big fat molecular complexes called chromosomes that contain our DNA. If the cells are from a bird or reptile, you ...