Nondisjunction The failure of homologous chromosomes to segregate into each daughter cell during mitotic or meiotic anaphase. Making the right connections since The X and Y chromosomes which are responsible for sexual development. Tetrasomy The presence of four, instead of two, of a particular chromosome.
Genetics The scientific study of characteristics which are passed on inherited through successive generations in humans and other organisms due to the transmission of genetic material DNA.
The X and Y chromosomes which are responsible for sexual development. Half of the chromosomes 23 are inherited from the mother and half from the father. Polymorphism Literally many shapes. Gene A sequence of DNA within a chromosome, containing genetic reversed sex chromosomes cycle in Wollongong genetic code which is responsible for a particular bodily function or characteristic.
A glossary of terms can be valuable for families and professionals with little or no background in genetics and who may not be familiar with the language used in the descriptions and of the genetic basis of some conditions.
The fusion or exchange of material between chromosomes.
The term reversed sex chromosomes cycle in Wollongong also refer the the chromosomal constitution of a person, i. A double copy of part of a chromosome resulting in an extra abnormal dose of the duplicated material. Monosomy A single copy of a chromosome rather than a pair disomy.
Fetal Blood Sampling A prenatal diagnosis technique where a blood sample is obtained from the fetus. Genetics The scientific study of characteristics which are passed on inherited through successive generations in humans and other organisms due to the transmission of genetic material DNA.
The glossary is a guide to the more common terms that may be encountered but readers are advised that detailed information should be sought from qualified practitioners.
The term usually refers to loss of part of a chromosome partial deletion. We are members of. Three copies of part of a chromosome is partial trisomy. Tetraploidy The presence in a cell of four haploid sets 23 of parental chromosomes, giving a total chromosome count of This term does not apply to the acrocentric chromosomes which have an almost terminal centromere.