The court found that while an extra Y chromosome seems like a logical explanation for mutant-aggressive behaviour, there is not much evidence that links the X or Y chromosome to the deviant behaviour of serial killers.
The extra X and/or Y chromosome can affect physical, developmental, behavioral, and cognitive functioning. Common physical features may include tall stature, lack of secondary pubertal development, small testes (hypogonadism), delayed pubertal development, and breast development (gynecomastia) in late puberty.
Although many males with this condition are taller than average, the chromosomal change sometimes causes no unusual physical features. Most males with 47,XYY syndrome have normal production of the male sex hormone testosterone and normal sexual development, and they are usually able to father children.
What happens if you have 2 Y chromosomes?
When a sperm that has two Y chromosomes fertilizes an egg (which has an X chromosome), the resulting baby will be a male with two Y chromosomes and one X chromosome. It is also possible that a similar random event could occur very early in an embryos development.
INSTEAD OF THE NORMAL COMPLEMENT OF 46 CHROMOSOMES, THE CELLS OF SOME MENTALLY RETARDED, TALL CRIMINALS WERE FOUND TO CONTAIN 47, THE EXTRA ONE BEING A Y CHROMOSOME.
Can you have just two Y chromosomes?
XYY syndrome is a genetic condition that occurs when a male is born with an extra Y chromosome. Instead of having one X and one Y sex chromosome, those with XYY syndrome have one X and two Y chromosomes.
What happens if a human has 47 chromosomes?
Humans have 23 pairs of chromosomes. A trisomy is a chromosomal condition characterised by an additional chromosome. A person with a trisomy has 47 chromosomes instead of 46. Down syndrome, Edward syndrome and Patau syndrome are the most common forms of trisomy.
What is the YY gender?
Males with XYY syndrome have 47 chromosomes because of the extra Y chromosome. This condition is also sometimes called Jacobs syndrome, XYY karyotype, or YY syndrome. According to the National Institutes of Health, XYY syndrome occurs in 1 out of every 1,000 boys.
Can a female have Y chromosome?
Summary: Women born with a rare condition that gives them a Y chromosome dont only look like women physically, they also have the same brain responses to visual sexual stimuli, a new study shows.