Nondisjunction — Definition & Overview
Read this topicExplanations 4
- Definition of Nondisjunction Nondisjunction is when chromosomes fail to separate during meiosis. Nondisjunction can happen during anaphase I or anaphase II. Either homologous ch…
By Aaron Lauer, Alex Federspiel, Deena Hauze, Gabi Slizewska, Mario Janakis
- What Is Nondisjunction? Nondisjunction is an error during meiosis that creates eggs or sperm cells that have the wrong number of chromosomes. Recall that meiosis is the process …
By Deena Hauze, Alex Federspiel, Gabi Slizewska, Valeri Natole, Mario Janakis
- How Does Nondisjunction Affect an Organism? When major mutations arise, it could be due to nondisjunction. During nuclear division (meiosis or mitosis), pairs of chromosomes lin…
By Gabi Slizewska, Valeri Natole, Mario Janakis
- (Video) Visualizing Nondisjunction by Jack Lewis Nondisjunction results in sex cells that don't have the right number of chromosomes. It has a chance of happening during meiosis…
By Mario Janakis
Problems 21
- During what stage of cell replication did nondisjunction occur to produce these 4 gametes?
- What is nondisjunction?
- When is nondisjunction most likely to occur?
- Which of the following describes the figure above?
- Which of the following daughter cells is the result of nondisjunction in meiosis I?
- A male is born with XYY Syndrome (meaning he has an extra Y chromosome). Did the nondisjunction which resulted in the male's genotype occur in the cells of the mother or father?…
- Look at the figure above. What type of polysomy does the cell in the green square have?
- Which of the following is false about nondisjunction during mitosis?
- What is aneuploidy?
- Which of the following cells shows trisomy?
- Which of the following cells shows monosomy?
- During which of the following can nondisjunction occur?
- When nondisjunction occurs during mitosis, it results in mosaicism. What is mosaicism?
- When nondisjunction occurs during meiosis I, which structures fail to separate?
- When nondisjunction occurs during mitosis, which structures fail to separate?
- Down Syndrome is a genetic condition caused by an extra chromosome 21. What type of cellular error leads to this?
- Nondisjunction can result in trisomy. What type of chromosomal mutation has the same effect?
- What is shown in the cell above?
- The diagram above is called a karyotype. It shows the chromosomes that an individual possesses. In which chromosome did nondisjunction occur?
- The diagram above is commonly used to display all the chromosomes that a person has. What is it called?
- When nondisjunction occurs during mitosis, which structures fail to separate?