Definition of Nondisjunction. Meaning of Nondisjunction. Synonyms of Nondisjunction

- Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division (mitosis/meiosis). There are three...
- called nondisjunction, in which normal cell division is interrupted and produces gametes with too many or too few chromosomes. Nondisjunction is a random...
- generally not inherited, but rather occurs via a random event called nondisjunction during gamete or zygote development. The formal term for the karyotype...
- diagnosis is reached. Pentasomy X is not inherited but rather occurs via nondisjunction, a random event in gamete development. In rare cases, it may be related...
- II. A failure to separate properly is known as nondisjunction. There are two main types of nondisjunction that occur: trisomy and monosomy. Trisomy is caused...
- designation (46,XX). Trisomy 21 (47,XY,+21) is caused by a meiotic nondisjunction event. A typical gamete (either egg or sperm) has one copy of each chromosome...
- caused by nondisjunction of chromosomes during meiosis; the mosaic form is caused by nondisjunction during mitosis. Like all nondisjunction conditions...
- nondisjunction event during paternal meiosis I, maternal meiosis I, or maternal meiosis II, also known as gametogenesis. The relevant nondisjunction in...
- not caused by characteristics of the parents, but rather occurs via nondisjunction, a random event in gamete development. The karyotype observed in the...
- reproductive cells (eggs and sperm). An error in cell division called nondisjunction results in a reproductive cell with an abnormal number of chromosomes...