Chromosome Y News and Research

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The Y chromosome is one of the two sex chromosomes in humans (the other is the X chromosome). The sex chromosomes form one of the 23 pairs of human chromosomes in each cell. The Y chromosome spans about 58 million base pairs (the building blocks of DNA) and represents almost 2 percent of the total DNA in cells.

Each person normally has one pair of sex chromosomes in each cell. The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes.

Identifying genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. The Y chromosome likely contains between 70 and 200 genes. Because only males have the Y chromosome, the genes on this chromosome tend to be involved in male sex determination and development. Sex is determined by the SRY gene, which is responsible for the development of a fetus into a male. Other genes on the Y chromosome are important for male fertility.

Many genes are unique to the X or Y chromosome, but genes in an area known as the pseudoautosomal region are present on both chromosomes. As a result, men and women each have two functional copies of these genes. Many genes in the pseudoautosomal region are essential for normal development.

Genes on the Y chromosome are among the estimated 20,000 to 25,000 total genes in the human genome.

Study sheds new light on male infertility

Hope has emerged for infertile men as scientists at Newcastle University have understood the importance of a gene in regulating the production of fully-functioning sperm.

24 Jan 2019

New research focuses on noise sensitivity and general fearfulness of canine behavior

Researchers in the Hannes Lohi research group in the University of Helsinki focused on two forms of canine fearfulness: noise sensitivity and general fearfulness.

24 Jan 2019

Experimental drug can positively modify key characteristic behavior in FXS patients

Researchers at MIND Institute at UC Davis and Rush University Medical Center have found that mavoglurant, an experimental drug known as a mGluR5 negative modulator, can positively modify a key characteristic behavior in individuals with fragile X syndrome.

22 Jan 2019

Scientists aim to find genetic causes of developmental abnormalities in the vagina and uterus

A percentage of females are born with a missing or underdeveloped vagina and uterus, and scientists are working to analyze the genes of hundreds of them to get a better idea about causes, improve genetic counseling and ideally treatment.

22 Jan 2019

Unexpected connection found between feeding and memory centers of the brain

The search for a mechanism that could explain how the protein complex NCOR1/2 regulates memory has revealed an unexpected connection between the lateral hypothalamus and the hippocampus, the feeding and the memory centers of the brain, respectively.

21 Jan 2019

Researchers discover how cancer cells avoid genetic meltdown

A team of scientists have shed light on how cancer cell populations avoid genetic meltdown, despite the rapid accumulation of harmful mutations.

15 Jan 2019

Researchers identify genetic risk factor for atypical heart attack in women

New research published by teams from Leicester, UK and Paris, France in collaboration with international partners from the US and Australia, has found a common genetic factor that confers a significant risk of atypical heart attacks in women.

7 Jan 2019

European scientists aim to identify causes of dementia

Dementia is common to a variety of neurodegenerative diseases such as Alzheimer's disease, Parkinson disease and Down syndrome. This common symptom is one of the major causes of disability and dependency among older people.

19 Dec 2018

Researchers uncover genes that play a key role in the inactivation of X chromosomes

In cell biology, men and women are unequal: men have an X chromosome, while women have two. How can we get around this difference?

19 Dec 2018

New compound blocks genetic cause of familial ALS and frontotemporal dementia

Since the ice bucket challenge went viral in 2014, raising awareness and funding for ALS research, scientists have learned much about a disease that disconnects muscles from nerves, leading to muscle atrophy and eventual death. Their ultimate goal is to create medications capable of stopping ALS in its tracks.

18 Dec 2018

Folate deficiency creates more damaging chromosomal abnormalities than previously known

Folate deficiency creates more problems in connection with DNA replication than researchers had hitherto assumed, researchers from the University of Copenhagen show in a new study.

14 Dec 2018

Geneticists discover how sex-linked disorders arise

Researchers have discovered a regulatory gene carried on the Y chromosome that determines whether a baby will be male or female and the risk of disease.

14 Dec 2018

MUHC's 'Dr. House' discovers new genetic disease and the gene responsible for it

A team from the Research Institute of the McGill University Health Centre led by Dr. Donald Vinh, the RI's so-called "Dr. House" because of his research into rare diseases, has discovered a new human disease and the gene responsible for it, paving the way for the proper diagnosis of patients globally and the development of new therapies.

7 Dec 2018

Study reveals how the absence of Dna2 enzyme affects chromosome instability

Cells have in place a number of mechanisms to protect the integrity of the genome, including processes that repair mistakes that may occur during DNA replication.

6 Dec 2018

New massive sequencing platform implemented for double factor preimplantation genetic testing

A research team from the Universitat Autònoma de Barcelona, in collaboration with the Blood and Tissue Bank of Catalonia, has managed to implement a massive sequencing platform for Preimplantation Genetic Testing for the first time in history.

5 Dec 2018

Researchers reveal previously unknown genetic effect that can raise or reduce risk of heart disease

Atherosclerotic disease, the slow and silent hardening and narrowing of the arteries, is a leading cause of mortality worldwide, responsible for more than 15 million deaths each year, including an estimated 610,000 people in the United States.

28 Nov 2018

Using molecular targeting approach to kill melanoma cells

In 1960, scientists described the "Philadelphia chromosome" that causes chronic myeloid leukemia, and in 2001 the Food and Drug Administration approved the drug imatinib to disable the action of this cancer-causing genetic change.

27 Nov 2018

A love of coffee and tea is mostly genetic

The morning coffee or tea can perk one up for the day, however, for some of us these beverages are too bitter. Researchers have now found that the bitter taste experienced is all down to genes. The new study titled, “Understanding the role of bitter taste perception in coffee, tea and alcohol consumption through Mendelian randomization,” was published in the latest issue of the journal Nature Scientific Reports.

25 Nov 2018

Researchers identify molecule to fight myotubular myopathy

Myotubular myopathy is a severe genetic disease that leads to muscle paralysis from birth and results in death before two years of age. Although no treatment currently exists, researchers from the University of Geneva, Switzerland, - working in collaboration with the University of Strasbourg, France, - have identified a molecule that not only greatly reduces the progression of the disease but also boosts life expectancy in animal models by a factor of seven.

19 Nov 2018

Reducing cellular proliferation could help deplete HIV reservoir and lead to a functional cure

A majority of the HIV-infected cells that persist in HIV-infected individuals even during suppressive antiretroviral therapy originated from cellular proliferation, not viral replication, according to new research published in Nature Communications.

17 Nov 2018