You may have learned in school that humans have 23 pairs of chromosomes: 22 “autosomes” and their partners, which contain pretty much the same genes and in the same order, plus one pair of sex ...

Meiosis -- the pairing and recombination of chromosomes, followed by segregation of half to each egg or sperm cell -- is a major crossroads in all organisms reproducing sexually. Yet, how the cell ...

Since the 1 920s, when researchers began to study chromosomes, the analysis of human chromosomes has presented a particularly tough technological challenge, simply because there are so many of them.

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made of protein and a single molecule of deoxyribonucleic acid (DNA). Passed from ...

Neil Hunter, a professor in the Department of Microbiology and Molecular Genetics, has discovered a crucial step in how chromosomes stay connected during the development for egg cells and sperm, ...

PATIENTS with the clinical syndrome of mongolism have been shown to have 47 chromosomes instead of the 46 that are present in the normal human karyotype. 1–3 The additional chromosome, a member of the ...