Chromosomes carrying the mutation causing the fragile X [ fra (X) ] syndrome have been shown to have an unstable DNA sequence close to or within the fragile site. The length variation is located ...

“The mutation that causes FXS can ... “Because females have two X chromosomes, and usually only one of them is affected by ...

Females (XX) carry twice as many X-linked genes on their sex chromosomes as males (XY). How do cells control gene expression to manage this potentially lethal dosage problem? A prime example of X ...

For example, mutations in the FMR1 gene on the X chromosome cause fragile X syndrome, a condition associated with intellectual disability. Turner syndrome, a condition where females are born with only ...

Previous research has hinted that the X chromosome is vital to brain health. Mutations in the X chromosome may cause intellectual disability, and women born with just one X chromosome (a diagnosis ...

Fragile X syndrome is caused by an expansion of CGG nucleotide repeats in the FMR1 gene at the end of the long arms of the X chromosome. To identify the mutation, researchers culture cells in media ...

Human biological sex is determined by the sex chromosomes X and Y. In most cases ... generation which helps to eliminate damaging gene mutations," Darren Kent, a professor at the University ...

An individual’s growth and development is affected by the genes they inherit from their parents. An example of a human chromosome mutation is when a child inherits an extra copy of chromosome 21.

Some mutations can affect the structure of one or more chromosomes - these are chromosome structure mutations.