Nonetheless, Mendel and Darwin's work laid the foundation for formulating a testable, research-based theory of heredity. Thus, Flemming recognized that chromosomal movement during mitosis offered ...

Scientific debates can be as passionate and high-profile as political ones. Learn about an epic battle waged between the Castle and Morgan laboratories over the organization of genes. Sturtevant's ...

This video segment from NOVA: "Judgment Day: Intelligent Design on Trial" reveals how genetic evidence helped to confirm an important component of Darwin's theory of evolution by natural selection ...

X chromosomes are expressed differently depending ... are inherited from the mother or the father. The imprinted brain theory developed by Christopher Badcock and Bernard Crespi hypothesizes ...

When scientists today work to decode the human genome, they use high-tech methods to view the microscopic chromosomes and ... heredity left a big gap in his theory of natural selection.

Why are the human sex chromosomes called “X” and “Y,” while the other 22 chromosomes are identified only by numbers? The answer begins in the late 1800s, when insect gonad cells, whose large ...

The team also wants to investigate what these findings might mean for males, who carry only maternal X chromosomes — and could, in theory, then have greater rates of brain aging. "One can ...

Each cell with a nucleus contains chromosomes, which are made from DNA Human body cells each contain 23 pairs of chromosomes, half of which are from each parent. So, human gametes (eggs and sperm ...

but with an essential chromosomal locus as the pathogen. The result is centromeric DNA and proteins that are highly variable even between closely related species. For this reason, the drive theory ...