Cytologists had been studying chromosome behavior since the late 19th century. Why did it take until 1956 to figure out the correct human chromosome number, thanks to Joe Hin Tjio and Albert Levan?

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.

McClintock and Creighton followed the "knob" on a specific chromosome in maize gametes and correlated this physical structure with specific phenotypes. How does DNA recombination work? It occurs ...

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 ...

All men and only men have a Y chromosome. This biological fact allows us to trace back in time a direct, largely unchanged genetic line of inheritance from father to son. Every person, male or ...

Sex determination at birth is decided on the chromosomes the baby has. A female has two X chromosomes, whereas a male has one ...

You have an old radio — in the case of [The Radio Mechanic], a Stromberg Carlson — and it needs new knobs. What do you do? You can’t very well pop down to the local store and find any knobs ...

And for that, she got a Nobel prize all to herself, which is no small feat either. Human chromosomes, long strands of DNA by Steffen Dietzel CC BY-SA 3.0 McClintock was born on June 16 ...

A team of biologists, environmental scientists and geneticists affiliated with multiple institutions across the U.S. has ...

In the 1980s, scientists knew little about the X and Y chromosomes. What they did understand was that every cell in the body contains 23 pairs of chromosomes. Each of these pairs is similar ...

Increased risk for autism appears to be linked to the Y chromosome, a Geisinger Health System study has found, offering a new explanation for the greater prevalence of autism in males. The results ...