AP BIOLOGY

Detailed explanation-1: -Klinefelter syndrome (sometimes called Klinefelter’s, KS or XXY) is where boys and men are born with an extra X chromosome. Chromosomes are packages of genes found in every cell in the body. There are 2 types of chromosome, called the sex chromosomes, that determine the genetic sex of a baby.

Detailed explanation-2: -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.

Detailed explanation-3: -Klinefelter syndrome (KS), 47, XXY, is the most frequent sex chromosome syndrome (1 per 660 live born males) (Gravholt et al., 2018). People with KS are phenotypically male, but have an extra X chromosome.

Detailed explanation-4: -Klinefelter Syndrome (47, XXY) is a chromosomal variation in males in which one extra X chromosome is present, resulting in a 47, XXY karyotype. The extra X chromosome typically affects physical, neurodevelopmental, behavioral, and neurocognitive functioning.

Detailed explanation-5: -Frequency. Klinefelter syndrome affects about 1 in 650 newborn boys. It is among the most common sex chromosome disorders, which are conditions caused by changes in the number of sex chromosomes (the X chromosome and the Y chromosome).