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.
Having older brothers may increase the likelihood of being gay

Having older brothers may increase the likelihood of being gay

Simple molecular test may help predict presence of high-grade pancreatic cancers

Simple molecular test may help predict presence of high-grade pancreatic cancers

SLU scientists provide promising approach in designing new drugs for DMD

SLU scientists provide promising approach in designing new drugs for DMD

Study shows how interplay between two key enzymes promotes brain tumor growth

Study shows how interplay between two key enzymes promotes brain tumor growth

Research shows how cells rebuild nucleus, organize genome after division

Research shows how cells rebuild nucleus, organize genome after division

Leishmania genome study reveals the parasites adaptation to the environment

Leishmania genome study reveals the parasites adaptation to the environment

Leishmania adaptation to environmental changes results from frequent chromosomal amplifications

Leishmania adaptation to environmental changes results from frequent chromosomal amplifications

OBD presents results of immunotherapy studies at FNIH Biomarker Consortium Cancer Steering Committee’s annual meeting

OBD presents results of immunotherapy studies at FNIH Biomarker Consortium Cancer Steering Committee’s annual meeting

New technique may reveal clues about role of centromeres in Down syndrome, other birth defects

New technique may reveal clues about role of centromeres in Down syndrome, other birth defects

Aging tests disagree with one another

Aging tests disagree with one another

Russian scientists uncover previously unknown effect of leukemia drug

Russian scientists uncover previously unknown effect of leukemia drug

KU Leuven researchers unravel how cell division timer works

KU Leuven researchers unravel how cell division timer works

Research casts light on how chromosomes 'cheat' for chance to get into a sex cell

Research casts light on how chromosomes 'cheat' for chance to get into a sex cell

Scientists identify treatments that may restore brain function to autism patients

Scientists identify treatments that may restore brain function to autism patients

Our chromosomes also wrinkle with age, research shows

Our chromosomes also wrinkle with age, research shows

New gene drive approach helps pinpoint combination therapies against fungal pathogens

New gene drive approach helps pinpoint combination therapies against fungal pathogens

Biogen and Ionis awarded 2017 Prix Galien USA Award for SPINRAZA

Biogen and Ionis awarded 2017 Prix Galien USA Award for SPINRAZA

New analysis method allows to efficiently search for gene transfers onto Y chromosome

New analysis method allows to efficiently search for gene transfers onto Y chromosome

Study discovers new genetic risk loci linked to children's food allergies

Study discovers new genetic risk loci linked to children's food allergies

Genomic roots of ovarian tumors may arise in fallopian tubes, study suggests

Genomic roots of ovarian tumors may arise in fallopian tubes, study suggests