Chromosome News and Research

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In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.

Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.
Unexpected connection found between feeding and memory centers of the brain

Unexpected connection found between feeding and memory centers of the brain

Researchers discover how cancer cells avoid genetic meltdown

Researchers discover how cancer cells avoid genetic meltdown

Researchers identify genetic risk factor for atypical heart attack in women

Researchers identify genetic risk factor for atypical heart attack in women

Research reveals factors at play in genetic incompatibility of different species

Research reveals factors at play in genetic incompatibility of different species

European scientists aim to identify causes of dementia

European scientists aim to identify causes of dementia

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

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

New compound blocks genetic cause of familial ALS and frontotemporal dementia

New compound blocks genetic cause of familial ALS and frontotemporal dementia

Folate deficiency creates more damaging chromosomal abnormalities than previously known

Folate deficiency creates more damaging chromosomal abnormalities than previously known

Geneticists discover how sex-linked disorders arise

Geneticists discover how sex-linked disorders arise

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

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

Study reveals how the absence of Dna2 enzyme affects chromosome instability

Study reveals how the absence of Dna2 enzyme affects chromosome instability

New massive sequencing platform implemented for double factor preimplantation genetic testing

New massive sequencing platform implemented for double factor preimplantation genetic testing

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

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

Using molecular targeting approach to kill melanoma cells

Using molecular targeting approach to kill melanoma cells

A love of coffee and tea is mostly genetic

A love of coffee and tea is mostly genetic

Researchers identify molecule to fight myotubular myopathy

Researchers identify molecule to fight myotubular myopathy

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

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

Non-coding genetic variant plays key role in endothelial function and disease incidence

Non-coding genetic variant plays key role in endothelial function and disease incidence

New study provides deeper insight into chromosome segregation during mitosis

New study provides deeper insight into chromosome segregation during mitosis

Failed DNA repair triggers chromosomal chaos in cancer cells

Failed DNA repair triggers chromosomal chaos in cancer cells