The XO *** determination system is found in insects like true bugs, grasshoppers, and locusts.
XYY and XXY is a disorder
Klinefelter syndrome
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
* chromosomes, that determine the genetic * of a baby. These are named either X or Y.
Usually, a female baby has 2 X chromosomes (XX) and a male has 1 X and 1 Y (XY). But in Klinefelter syndrome, a boy is born with an extra copy of the X chromosome (XXY).
The X chromosome is not a "female" chromosome and is present in everyone. The presence of a Y chromosome denotes male ***.
Boys and men with Klinefelter syndrome are still genetically male, and often will not realise they have this extra chromosome, but occasionally it can cause problems that may require treatment.
Symptoms of Klinefelter syndrome
Klinefelter syndrome does not usually cause any obvious symptoms early in childhood, and even the later symptoms may be difficult to spot.
Many boys and men do not realise they have it.
Possible features, which are not always present, may include:
- in babies and toddlers – weak muscles and very flexible (hypermobile) joints, learning to sit up, crawl, walk and talk later than usual, being quieter and more passive than usual, having undescended testicles, only one testicle, or a smaller *****
- in childhood – shyness and low self-confidence, problems with reading, writing, spelling and paying attention, mild You do not have permission to view the full content of this post.
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Log in or register now., low energy levels, and difficulty socialising or E×ρréššing feelings
- in teenagers – growing taller than expected for the family (with long arms and legs), broad hips, poor muscle tone and slower than usual muscle growth, reduced facial and body hair that starts growing later than usual, small, firm testes, and enlarged breasts (You do not have permission to view the full content of this post.
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- in adulthood – You do not have permission to view the full content of this post.
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Log in or register now., small, firm testes, and erection problems.
may gad atleast alamin mo naman sinasabi mo