LIFE SCIENCE

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: -Turner syndrome (monosomy of the X chromosome, 45, X/partial monosomy of the X) is the most common sex chromosome abnormality known in females. It is associated with a high degree of embryonic lethality and thus fewer cases than expected are observed clinically.

Detailed explanation-3: -About half of individuals with Turner syndrome have monosomy X, which means each cell in the individual’s body has only one copy of the X chromosome instead of the usual two sex chromosomes. Turner syndrome can also occur if one of the sex chromosomes is partially missing or rearranged rather than completely absent.

Detailed explanation-4: -Turner syndrome occurs when part or all of an X chromosome is missing from most or all of the cells in a girl’s body. A girl normally receives one X chromosome from each parent. The error that leads to the missing chromosome appears to happen during the formation of the egg or sperm.