EDIT: Thought you ought to be quoted in this...
I was under the impression, due to a badly worded lecture in "Origins and Evolution of Life" at uni, that an XXY chromosome denoted someone who was born hermaphroditic.
The more you know!
Link to full article here: [link=http://inovapeds.org/library/readings/Down%20Syndrome/Down%20syndrome,%20Turner%20syndrome,%20and%20Klinefelter%20syndrome.pdf]
Tyler, C., & Edman, J. C. (2004) Down syndrome, Turner syndrome, and Klinefelter syndrome: primary care throughout the life span. USA Primary Care Clinical Office Practice, 31(1), 627-648.[/link]
(Couldn't indent second line... )
EDIT: Edited in quote boxes for ease of viewing...
I've only been off of uni for one day... O.O I better get started on a lab report for a couple months time or something.
I went one better than google:cahtush said:well im not 100% sure it could be on other (cromosones) too
Tyler and Edman (2004) said:"The cause of Down syndrome is trisomy, or presence of three copies of
some or all of chromosome 21. Down syndrome is caused 95% of the time
by nondisjunction of chromosome 21 during the meiotic formation of the
spermatocyte or oocyte. Around 4% of individuals with Down syndrome
have the ??extra?? copy of chromosome 21 attached, or translocated, to
another chromosome; in one third of these cases, this translocation also is
present in one of the parents." (Tyler & Edman, 2004)
Phenotypes common in Klinefelter patients dependant on age.Tyler and Edman (2004) said:"Most individuals with Klinefelter syndrome bear an extra X chromosome,
resulting in a karyotype of 47,XXY [...]" (Tyler & Edman, 2004)
So it turns out that although you were not wrong, an XXY chromosome does not mean someone necessarily has Down Syndrome. Although it would be impossible for someone with XXY chromosomes to become pregnant.Tyler and Edman (2004) said:"Age------------Features
Infancy---------Usually none, occasionally hypospadias, small phallus, cryptorchidism
Toddler---------Developmental speech delay
Childhood-------Accelerated linear growth velocity
----------------Learning disabilities
Adolescence-----Gynecomastia
----------------Eunuchoid body habitus; arm span> height
----------------Small testicular volume
----------------Sparse axillary, facial, pubic hair
Adult-----------Infertility
----------------Leg ulcers"
(Tyler & Edman, 2004)
I was under the impression, due to a badly worded lecture in "Origins and Evolution of Life" at uni, that an XXY chromosome denoted someone who was born hermaphroditic.
The more you know!
Link to full article here: [link=http://inovapeds.org/library/readings/Down%20Syndrome/Down%20syndrome,%20Turner%20syndrome,%20and%20Klinefelter%20syndrome.pdf]
Tyler, C., & Edman, J. C. (2004) Down syndrome, Turner syndrome, and Klinefelter syndrome: primary care throughout the life span. USA Primary Care Clinical Office Practice, 31(1), 627-648.[/link]
(Couldn't indent second line... )
EDIT: Edited in quote boxes for ease of viewing...
I've only been off of uni for one day... O.O I better get started on a lab report for a couple months time or something.