Some of the possible treatments listed in sources for treatment of Stuttering may include: 1  Speech therapy. 2  Watchful waiting - many childhood cases disappear though some remain. 3  Treatment of an underlying problem. 4  Betaxolol. 5  Betoptic. 6  Betoptic-Pilo. 7  Betoptic-S. 8  more treatments...Â».
Sex Chromosomes. Sex chromosomes are particular chromosomes that are involved in determining the sex of an organism. In the cells of humans and many other organisms the sex chromosomes consist of a pair of chromosomes called the X and Y chromosomes. The X and Y chromosomes were first discovered in beetles by Nettie Stevens in 1906.
The sex chromosomes determine whether you are a boy (XY) or a girl (XX). The other chromosomes are called autosomes. The karyotype of a male human being. The largest chromosome, chromosome 1, contains about 8000 genes. The smallest chromosome, chromosome 21, contains about 300 genes.