AP BIOLOGY

Detailed explanation-1: -Turner syndrome, a condition that affects only females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing. Turner syndrome can cause a variety of medical and developmental problems, including short height, failure of the ovaries to develop and heart defects.

Detailed explanation-2: -Human conditions due to monosomy: Turner syndrome – People with Turner syndrome typically have one X chromosome instead of the usual two X chromosomes. Turner syndrome is the only full monosomy that is seen in humans-all other cases of full monosomy are lethal and the individual will not survive development.

Detailed explanation-3: -Monosomy refers to the condition in which only one chromosome from a pair is present in cells rather than the two copies usually found in diploid cells. When cells have one chromosome from a pair plus a portion of the second chromosome, this is referred to as partial monosomy.

Detailed explanation-4: -Turner syndrome results from a deletion or the non-functioning of one X chromosome in females. About half of the population with Turner syndrome have monosomy X (45, XO). The other 50% of the population has a mosaic chromosomal component (45, X with mosaicism).

Detailed explanation-5: -Turner syndrome (TS), sometimes referred to as congenital ovarian hypoplasia syndrome, is a genetic disorder. It is the most common sex chromosomal abnormality affecting girls and women.