Female (XX) mammals inherit one X chromosome from each parent, but males (XY) receive an X from their mother and a Y sex chromosome from their father. X and Y chromosomes determine not only the ...

The octopus just revealed another one of its secrets: what determines its sex. University of Oregon researchers have ...

Female (XX) mammals inherit one X chromosome from each parent, but males (XY) receive an X from their mother and a Y sex chromosome from their father. X and Y chromosomes determine not only the ...

This phenomenon raises intriguing questions about the future of human evolution ... 22 autosomes and one pair of sex chromosomes—XX in females and XY in males. The Y chromosome, significantly ...

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 ...

Some fish have a gene that determines sex, but not a whole chromosome. Even in humans, the X/Y sex chromosome system isn't as clear-cut as it might look on paper; gene mutations or inheriting ...

Our sex chromosomes were originally a pair of typical XY chromosomes ... A small accident could tip it over the edge, or the ...

A 2017 study published in the journal PLOS Genetics said the chromosome's evolution of palindromes — DNA sequences that read the same forward as backward — and repetitive copies of genes could ...