These new combinations result from the exchange of DNA between paired chromosomes. Such exchange means that the gametes produced through meiosis exhibit an amazing range of genetic variation.

Each human cell contains 23 pairs of chromosomes that carry DNA within their nucleus. The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair. They determine the ...

In 1905, while studying the gametes of the beetle Tenebrio molitor (Figure 2), Stevens noted an unusual-looking pair of chromosomes that separated to form sperm cells in the male beetles.

In particular, it explains that humans have one fewer chromosome pair in their cells than apes, due to a mutation found in chromosome number 2 that caused two chromosomes to fuse into one.

whereas a male has one X and one Y chromosome. According to Medline Plus, in every cell, humans possess 23 pairs of ...

Whether the baby is male or female. In humans there are 23 pairs of chromosomes, including the sex chromosome pair. There are two types of sex chromosome: If the father has hemophilia and the ...

These manuals come in pairs, with 23 pairs of "chapters," called chromosomes. In each pair, one chromosome comes from your mother and one from your father. For 22 of those pairs, the chapters ...

A new study finds that, in healthy women, some breast cells that otherwise appear normal may contain chromosome abnormalities typically associated with invasive breast cancer. The findings question ...

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 ...

A new study from researchers at The University of Texas MD Anderson Cancer Center finds that, in healthy women, some breast cells that otherwise appear normal may contain chromosome abnormalities ...