Figure 1 shows an idiogram for chromosome 12, a medium-sized chromosome with one long and one short arm. The position of the centromere, which separates the p and q arms, is shown by the hatched area.

But what the teacher may not have shared is that the Y chromosome is much smaller, carrying around 55 genes compared to roughly 900 on the X. All embryos are technically female until around 12 ...

The X chromosome carries at least 150 genes linked to intelligence. Since the mother has two X chromosomes to pass along while the father only has one, the mother’s contribution to the child’s ...

Human biological sex is determined by the sex chromosomes X and Y. In most cases, females possess two X chromosomes, while males have one X and one Y. However, there is some evidence that the Y ...

While using a light microscope to study sperm formation in wasps, Henking noticed that some wasp sperm cells had 12 chromosomes, while others had only 11 chromosomes. Also, during his observation ...