Turner syndrome is a female-only genetic disorder that affects about 1 in every 2,000 baby girls. A girl with Turner syndrome only has 1 normal X sex chromosome, rather than the usual 2.
Prostate cancer, testicular cancer and other diseases of the male reproductive system occur in males. Diseases of X-linked recessive inheritance, such as colour blindness, occur more frequently in males, and haemophilia A and B occur almost exclusively in males.
Y-linked genetic diseases only affect males.
Because females have two X chromosomes and no Y chromosome, they cannot inherit Y-linked genetic disorders.
And in humans this is the X or the Y chromosomes. And so some of the more familiar sex-linked traits are hemophilia, red-green color blindness, congenital night blindness, some high blood pressure genes, Duchenne muscular dystrophy, and also Fragile X syndrome.
Affected populations
Swyer syndrome affects girls who have an XY chromosomal makeup, no ovaries, but functional female organs including the uterus, fallopian tubes and vagina. The exact incidence is unknown. One estimate placed the incidence at 1 in 80,000 births.
Overview. Ambiguous genitalia is a rare condition in which an infant's external genitals don't appear to be clearly either male or female. In a baby with ambiguous genitalia, the genitals may be incompletely developed or the baby may have characteristics of both sexes.
Statistics about women and girls' mental health
Today, women are three times more likely than men to experience common mental health problems. In 1993, they were twice as likely.
RPI Deficiency
This is considered to be the rarest disease in the world. Ribose-5-Phosphate Isomerase (RPI), is a crucial enzyme in a metabolic process in the human body. This condition can cause muscle stiffness, seizures, and reduction of white matter in the brain.
Overview. Turner syndrome, a condition that affects only females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing.
What Is Klinefelter Syndrome? Klinefelter syndrome is a fairly common genetic condition found in males only.
Klinefelter syndrome is a genetic condition that results when a boy is born with an extra copy of the X chromosome. Klinefelter syndrome is a genetic condition affecting males, and it often isn't diagnosed until adulthood.
If an intersex person is born with a functioning uterus, ovaries, and a vagina, most likely that person will start menstruating at puberty. The experience of having a period can vary hugely from person to person, and this true for those who are intersex as well!
Some intersex people have both testes and ovaries. You may be able to get pregnant on your own, if you also have a uterus. However, if you have testes, they may be releasing more testosterone than would be optimal for conception and pregnancy.
The person must have both ovarian and testicular tissue. This may be in the same gonad (an ovotestis), or the person might have 1 ovary and 1 testis. The person may have XX chromosomes, XY chromosomes, or both. The external genitals may be ambiguous or may appear to be female or male.
Klinefelter syndrome only affects males.
All human individuals—whether they have an XX, an XY, or an atypical sex chromosome combination—begin development from the same starting point. During early development the gonads of the fetus remain undifferentiated; that is, all fetal genitalia are the same and are phenotypically female.
Since autosomal dominant disorders involve autosomes or the non-sex chromosomes, the disorders affect males and females equally.
People with partial androgen insensitivity (also called Reifenstein syndrome) can have genitalia that look typically female, genitalia that have both male and female characteristics, or genitalia that look typically male. They may be raised as males or as females and may have a male or a female gender identity.
Pneumonia. Pneumonia is the leading infectious cause of death among children under 5, killing approximately 700,000 children a year.
Kallmann syndrome is a condition characterized by delayed or absent puberty and an impaired sense of smell. This disorder is a form of hypogonadotropic hypogonadism, which is a condition resulting from a lack of production of certain hormones that direct sexual development.
Little's disease is a congenital stiffness of the limbs due to failure of development of the pyramidal tracts. In this condition both legs are spastic, weak and clumsy, and are held usually in extension and adduction. The gait is the typical scissor gait due to severe spasticity.
Nondisjunction. In most cases, either the mother's egg cell or the father's sperm cell divides incorrectly, resulting in an extra X chromosome in the child. This random error is called nondisjunction, and all the cells in the child's body will have the extra X chromosome.