15 results found

Search Results for: nondisjunction

Nondisjunction

Definition noun (In mitosis) The failure of sister chromatids to separate during and after mitosis. (In meiosis) The failure... Read More

Chromosomal mutation

Every living thing is made up of DNA. Our DNA is what makes us unique and different in the world. Our DNA is made up of... Read More

Mosaicism

Cells often go through many divisions before they become a part of an organism’s genetic make-up. This leaves room for... Read More

Nullisomy

Definition noun (genetics) A type of aneuploidy characterized by the loss of a pair of homologous... Read More

Sterile

Sterile Definition What does sterile mean? In reproductive biology, we can define sterile as an inability to reproduce or... Read More

Gamete

Definition of Gamete What is a gamete? A gamete is the mature reproductive or sex cell that contains a haploid number of... Read More

Disjunction

Definition noun The normal separation or moving apart of chromosomes toward opposite poles of the cell during cell... Read More

Aneuploidy

Definition noun (genetics) The chromosomal variation due to a loss or a gain of one or more chromosomes resulting in the... Read More

Trisomy

Definition noun, plural: trisomies (genetics) A type of aneuploidy characterized by the gain of an extra copy of a... Read More

Monosomy

Definition noun (genetics) A type of aneuploidy characterized by the loss of a single chromosome of the normal... Read More

Genetic disorder

Definition noun, plural: genetic disorders A disorder caused by genetic abnormality Supplement A genetic disorder is a... Read More

Tetrasomy

Definition noun, plural: tetrasomies (genetics) A type of aneuploidy characterized by the gain of two extra chromosomes of... Read More

Polysomy

Definition noun, plural: tetrasomies (genetics) A type of aneuploidy characterized by the gain of two extra chromosomes of... Read More

Patau syndrome

Definition noun A genetic disorder caused by genetic changes in chromosome 13, such as an extra copy of chromosome 13... Read More

Non-Mendelian Inheritance

Reviewed by: Mary Anne Clark, Ph.D. The inheritance patterns seen in Mendel's monohybrid and dihybrid crosses... Read More