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 ...

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.

Science has revealed some of the secrets of the X chromosome, but many remain. In humans, female cells contain two X ...

How could this trait be explained? And did this fly disprove the basic premise of the chromosome theory? In the Morgan lab's search to make sense of the white-eyed female, Lilian Vaughn Morgan ...

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 ...

Again, fraternal twins are not identical and do not share the same chromosomes and genes. Can fraternal twins have different fathers? Created with Sketch. When a woman hyperovulates, or releases ...

it is highly condensed and wrapped around histones in order to fit inside of the nucleus and take part in the formation of chromosomes. Histones are basic proteins, and their positive charges ...

Chromosomal abnormalities can include two basic categories: numerical or structural. A structural abnormality can include an alteration to the structure of the chromosome, as the name suggests.

Conventional investigations of the genetic contributors to Alzheimer's disease (AD) risk and progression have ignored the role of the X-chromosome, primarily due to technical analysis limitations.