DNA of the male-determining Y chromosome has been completely sequenced end-to-end, and it’s just as weird as we expected. Will we finally be able to understand how it works?
Scientists have taken an important step forward in understanding the human genome - our genetic blueprint - by fully deciphering the enigmatic Y chromosome present in males, an achievement that could help guide research on infertility in men. Researchers on Wednesday unveiled the first complete sequence of the human Y chromosome, which is one of the two sex chromosomes - the X chromosome being the other - and is typically passed down from male parent to male offspring. It is the last of the 24 chromosomes - threadlike structures that carry genetic information from cell to cell - in the human genome to be sequenced.
For many people with fragile X, the mutated gene that causes symptoms is active rather than silenced. Thom Leach/Science Photo LibraryFragile X syndrome is a genetic disorder caused by a mutation in a gene that lies at the tip of the X chromosome. It is linked to autism spectrum disorders. People with fragile X experience a range of symptoms that include cognitive impairment, developmental and speech delays and hyperactivity. They may also have some physical features such as large ears and foreh
Turner syndrome, a genetic developmental disorder in females is caused by a missing or incomplete X- chromosome. Girls are short and have dysfunctional ovaries.