Y Chromosome
The Y chromosome is one of two sex chromosomes in humans (the other is the X chromosome). Normal females carry two X chromosomes, while males have one X and one Y chromosome.
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Y Chromosome -- The genetic material that transmits the information necessary to make a male. The Y chromosome can be found in one-half of the man's sperm cells. When an X and a Y chromosome combine, the baby will be a boy.
Y Chromosome-This is one of two chromosomes that determine the genetic sex of a person. Males have one Y chromosome and one X chromosome. Females have two X chromosomes.
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Y Chromosome Microdeletions
Ten to 20 percent of men with severe sperm abnormalities may have normal chromosomes but may be missing very tiny areas of their Y chromosome. These missing areas are called microdeletions.
Y Chromosome - The sex chromosome that plays a role in the sex determination of a fertilized egg. Males have one X and one Y chromosome, while females have two X chromosomes.
If a Y chromosome is able to complete this task, then you and your partner have conceived a boy. If it's an X chromosome that wins out, then you and your partner have conceived a girl. And, make no mistake.
Deletions in the Y chromosome. In some persons, there are the usual number of chromosomes (46) in the body cells, but small sections of the Y chromosome are missing or deleted.
Phenotypic spectrum of 45,X/46,XY males with a ring Y chromosome and bilaterally descended testes.
Fertil Steril, 91(3): 791-7. [Abstract] [Full-text]
Conservative management of cervical ectopic pregnancy.
Fertil Steril, 91(3): 671-4.
The MicroSort technology is based on the difference in size between an X chromosome and the much smaller Y chromosome. Since chromosomes are made of DNA, human sperm cells having an X chromosome will contain approximately 2.
The egg carries X chromosome while the sperm can carry X or Y chromosome. If X-carrying sperm fertilises the egg, a baby girl will be conceived and if a Y-carrying sperm fertilises the egg, a baby boy will be conceived.
If the sperm carries a Y chromosome, your baby will be a boy; if it's an X chromosome, you'll be welcoming a girl.
Every chromosome contains hundreds to thousands of your genes. Genes provide instructions for building proteins that help bodies grow and function properly.
So that's cool they can detect the Y chromosome in your blood at 12 weeks? 98% sounds like a pretty solid number too. I didn't know that. i thought you had to be at least 18 or even 20 weeks before you can find out what your having.
What I heard from other netters is: The sperm carrying X chromosomes are slower, but more durable than sperm carrying Y chromosomes.
Since females have two X chromosomes, and males have one X and one Y chromosome, females can be carriers of a gene on the X but are not affected (provided the other X has the normal copy of the gene).
There is a gene located on the short arm (top half) of the Y chromosome, called "SRY," which, if present, will cause the undifferentiated gonad to become testes (indicating a male) around the 6th week of fetal life.
Pericentric inversion of the y chromosome is usually a familial variant of no known clinical significance occurring in 1 in 1000 males.
Spermatozoa that carry the Y chromosome (required for a boy) get to the target very quickly, but they are less resistant.
Spermatozoa that carry the X chromosome (required for a girl) are slower, but are much more resistant.
Every sperm carries a half-set of genetic information with it, including an X or Y chromosome which will determine your baby's gender. The egg carries the other half set and the X chromosome.
This method of choosing the sex of your baby is based on the theory that sperm bearing Y chromosomes (for boys) swim faster but don't live as long as the slower swimming, longer-living sperm bearing X chromosomes (for girls).
Some of these genetic diseases are carried on the X or Y chromosome and are termed "sex linked" genetic diseases. The genetic structure XX yields a female child while the XY arrangement produces a male.
Karyotyping - A test analyzing chromosomes for potential genetic abnormalities.
Klinefelter's Syndrome - When a male is born with two X and one Y chromosome, causing possible feminine qualities and infertility.
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sex chromosomes - the 23rd pair of human chromosomes which determine gender; females have two X chromosomes; males have one X and one Y chromosome.
sibling - brother or sister.
Duplication of this chromosome set yields a 46, XX karyotype that is paternally derived (DNA is purely paternal in origin since all chromosomes are derived from the sperm and is diploid meaning there are two copies of every chromosome).
It is the introduction of additional male hormones (Androgens), triggered by the Y chromosome, in the child after about week 8 of development that begins the development of males.
Fig 9. FISH signals from a normal embryo. We know these are from a male ( XY) embryo as each has a orange signal ( orange dot) representing a single X chromosome, and a green signal, representing a single Y chromosome.
In men the karyotype would include 23 pairs (46) regular chromosomes and two sex chromosomes, one X and one Y chromosome.
Determine the cause of a baby's birth defects or disability.
Help determine the appropriate treatment for some types of cancer.
Identify the sex of a person by determining the presence of the Y chromosome.
Lexie, Lexi and Alexis Lest you think X names are only for those with a Y chromosome, let's not forget the mega-popularity of these X-studded gems.
" Turner's Syndrome: a genetically determined condition that is associated with the presence of only one complete X chromosome and no Y chromosome and that is characterized by a female phenotype with underdeveloped and infertile ovaries.
 See also: Chromosome, Pregnancy, X Chromosome, Genetic, Pregnant
  
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