A chromosome is a single, long molecule of DNA. These highly organized structures store genetic information in living organisms. Small sections of the chromosome, called genes, code for the RNA ...

This unmatched pair, known as the X and Y sex chromosomes, determines whether we are male (XY) or female (XX). A mother always provides a single X chromosome in her egg. Inherit an X from your ...

To further complicate matters, the tissues studied by Painter were obtained from a single institutionalized individual who was likely to have had constitutional numerical chromosome aberrations.

"You either have XX or XY chromosomes," Rep. Nancy Mace, R-S.C., wrote Feb. 20 on X. "Those are the options." Most commonly, a person is born with two X chromosomes (female) or an X and a Y (male).

Down syndrome is a genetic disorder caused by an extra chromosome 21, affecting brain and body development. It leads to ...

Members of the Jewish priesthood (Cohanim) are an unusual group in that the men of this ancient priestly class can claim descent from a single male ... the Y chromosomes of the Cohanim today ...

Analyzing overall shape and size doesn’t rule out rearrangements within the chromosome sequence, said Bill Earnshaw, a cell biologist at the University of Edinburgh who was not involved in the study. ...

The nucleus of a germline stem cell undergoes two divisions, firstly separating homologous chromosomes and secondly separating chromatids. Haploid gametes contain 23 single chromosomes.

Each human body cell contains 46 chromosomes. These can be arranged into 23 pairs. Each chromosome in a pair carries the same types of genes. The 23rd pair are the sex chromosomes: In females ...