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Males possess one Y and one X chromosome while females have two X chromosomes, with some exceptions. But until now, the Y chromosome part of the human genome had contained big gaps. In addition to identifying some additional Y chromosome genes, the researchers found that some DNA from the chromosome had been mistaken in previous studies as bacterial in nature. The first complete human genome - albeit with the Y chromosome partial - was published last year. Fully sequencing the Y chromosome adds to this.
Persons: Karen Miga, Carolyn Lagattuta, Arang Rhie, Monika Cechova, Cechova, Will Dunham, Rosalba O'Brien Organizations: University of California, UC Santa Cruz, REUTERS, Rights, Wednesday, U.S ., Genome Research, of California, UCSC, Thomson Locations: Santa Cruz , California, U.S, Handout, Santa Cruz
Elephant seals drift downwards in a "sleep spiral" when deep diving in the ocean, a new study found. Sleeping while deep diving allows the seals to avoid predators, scientists believe. The seals fall into sleep during deep dives of up to 377 meters, which is around 1,235 feet, to avoid predators. "This is not light sleep but real paralytic, deep sleep that would have humans snoring. The recordings showed the diving seals going into a sleep stage known as "slow-wave sleep" before transitioning into REM sleep, which leads to a kind of "sleep spiral" or sleep paralysis, experts found.
In the city of Santa Cruz, for example, affordable housing is so scarce some University of California students sleep in cars or classrooms. The most notable aims to alleviate California's housing crisis by permitting home construction on non-residential lots previously zoned for retail, offices, and parking. Owens hopes it will also ease the woes of UCSC students who can't find affordable housing on campus. According to the university, UCSC currently has just under 10,000 total spots available in campus housing for undergraduate, graduate and family housing. "A lot of the people who are bidding in Santa Cruz, don't have the income to match what landlords are asking," Owens said.
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