Is the mutation that causes Turner Syndrome dominant or recessive?

Answer 1

Turner Syndrome (45 XO) is the absence of one of the sex chromosomes. 45 YO is incompatible with life.

45 XO is not properly dominant or recessive as it involves the loss of a whole chromosome, rather than an allele of a gene.

It really is considered to be a form of aneuploidy and not a single gene disorder.

Answer 2

It isn't a gene - it's a mutation that just happens. It's a misalignment of choromosomes - it happens purely by chance. It is when a fetus is missing either a entire X chromosome or a partial part of one of their X chromosomes or partial parts of both X chromosomes.

I recently had a miscarriage and the cause was found to be Turner Syndrome. My dr told me all he knows about it and assured us up and down and all around that it was nobody's fault - it was just the genes not lining up properly - something happened during fertilization.

It is not "passed down" b/c women who have Turner Syndrome have ovarian failure or sometimes they don't even have ovaries and thus are unable to 'procreate' and pass it on.

I hope that helps some.

Answer 3

Turner syndrome is not a single mutation, but several chromosomal abnormalities. Monosomy X is the most common (this means that the individuals have only one X chromosome). It occurs in 1 out of every 2500 female births. Instead of the normal XX sex chromosomes for a female, only one X chromosome is present and fully functional. This is called 45,X or 45,X0, although other genetic variants occur. In Turner syndrome, female sexual characteristics are present but generally underdeveloped.

Answer 4

It is neither. Turner's syndrome is a chromosomal disorder found only in women. It is caused by either a missing or damaged X chromosome.