People normally have 46 chromosomes in each cell. Two of the 46 chromosomes, known as X and Y, are called sex chromosomes because they help determine whether a person will develop male or female sex characteristics. Females typically have two X chromosomes (46,XX), and males have one X chromosome and one Y chromosome (46,XY).. Triple X syndrome results from an extra copy of the X . Biological errors can happen during the early stages of cell division, causing some fetuses to develop with 47 chromosomes: Instead of 23 matched pairs, they have 22 pairs plus one set of three, a chromosomal abnormality called trisomy. Most fetuses with .
Like Down syndrome and other autosomal problems, sex chromosome gross abnormalities can be diagnosed before birth by amniocentesis and chorionic villi sampling. Sex chromosome abnormalities are gender specific. Normal males inherit an X and a Y chromosome while females have two X's. The sex chromosome contains many genes, and the traits controlled by these genes are aid to be Sex-linked. In the male fruit fly, what sex chromosomes will be in his gametes and in what proportions? 1/2X and 1/2Y. If the male fruit fly produces a gamete carrying an X .
May 10, 2007 · If I had 3 sex chromosomes (all x's) then what genetic disorder do I have? Females with trisomy X have three X chromosomes, for a total of 47 chromosomes per cell. The average IQ of females with this syndrome is 90, while the average IQ of their normal siblings is 100 . If you have 3 X chromosomes, then you have Trisomy X syndrome Status: Open. Small rearrangements of chromosomes cannot be detected. The karyotype can not tell you information about the 30,000 genes that are found along the length of chromosomes. While the karyotype can detect if a baby has a chromosome imbalance such as Down syndrome, it can 4/5(3).