Some of the conditions associated with sex-chromosome abnormalities in affected children include heart problems that may require surgery, learning and behavior difficulties, and adult infertility. ❋ Unknown (2008)
"Two possibilities are that the sperm being used is abnormal or the procedure itself leads to an increased risk of sex-chromosome abnormalities." ❋ Unknown (2008)
Psychosexual development is influenced by multiple factors including sex-chromosome genes, brain structure, social circumstance, family dynamics, and prenatal AE ie Androgen Effect - ZEB. ❋ Zoe Brain (2008)
Emerging evidence suggests direct effects of sex-chromosome genes on brain and behavior, but behavioral roles for Y-chromosome genes have not been identified. ❋ Zoe Brain (2008)
Identical twins are important in sexual-orientation research because, of course, they have identical genomes, including the sex-chromosome pair. ❋ Unknown (1997)
It must be explained that according to this theory the normal male is always heterozygous, because the _Y_ chromosome never carries any other factor except that for sex; it is thus of no more importance than the absence of an _X_ chromosome which occurs in those cases where the male has one sex-chromosome and the female two. ❋ J. T. Cunningham (1897)
It is evident that what Dr. Wilson means is that the sex-chromosome is unpaired, and that although it divides like the others in the homotypic division, in the heterotypic division it has no mate and so passes with half the number of chromosomes to one pole of the division spindle, while the other group of chromosomes has no sex-chromosome. ❋ J. T. Cunningham (1897)
The Mendelian theory therefore is that when an ovum has two X sex-chromosomes it can only after a number of cell-divisions, at the following reduction division, give rise to ova, while an ovum containing one X sex-chromosome, or two different, XY, chromosomes, at the next reduction division gives rise to spermatozoa. ❋ J. T. Cunningham (1897)
For the purpose of the present discussion we may conveniently name it the sex-chromosome. ❋ J. T. Cunningham (1897)
He remarks that the X chromosome must be a male-determining factor since in many cases it is the only sex-chromosome in the males, yet its introduction into the egg establishes the _female_ condition. ❋ J. T. Cunningham (1897)
In a second class of cases the sex-chromosome is double, consisting of two components which pass together to one pole. ❋ J. T. Cunningham (1897)
X sex-chromosome is not in itself either female or male, since, as we have seen, either ovum or spermatozoon may contain a single X chromosome. ❋ J. T. Cunningham (1897)
In a third class the sex-chromosome is accompanied by a fellow which is usually smaller, and the two separate at the differential division. ❋ J. T. Cunningham (1897)
The factor for red eye occurs in the sex-chromosomes, that is to say, according to this theory, the sex-chromosome does not merely determine sex but carries other factors as well, and this fact is the explanation of sex-linked inheritance. ❋ J. T. Cunningham (1897)
According to T.H. Morgan, it is simply due to the fact that the determinants for such characters are situated in the sex-chromosome. ❋ J. T. Cunningham (1897)
On fertilisation half the zygotes have _XX_ and half _XY_, whether _Y_ is absence of a sex-chromosome, or one of the other _Y_ forms above mentioned. ❋ J. T. Cunningham (1897)
“Multiple sex-chromosome mechanisms and polyploidy in animals” Journal of Genetics 51 (1953); “Two years’ survey of population dynamics in Drosophila melanogaster,” with J. Wahrman, A. Ledermann-Klein, & R. Weiss. ❋ Unknown (2009)
a rod of different shape for the female-producing sex-chromosome, and use the black rod for the dominant character: -- ❋ J. T. Cunningham (1897)
[Sex-chromosome anomaly] (abnormalities) are a result of [chromosome] [mutations]. ❋ Phoebe Jones (2016)
There's [NO such thing] as a sex-chromosome anomaly. Being gay, or lesbian isn't a disease, or a [deformity], no matter what people say, there's no need to make excuses [for why] people are gay, especially if you're truly proud to be gay or lesbian ❋ Ron Tha Don (2014)
