0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Nondisjunction occurs when?
homologous chromosomes fail to separate during meiosis
What happens if nondisjunction occurs during meiosos?
If nondisjunction occurs during meiosis the result could be a wide range of mutations. Most likely it would result in mosaicism meaning there will be a mixture of affected cells and non affected cells.
What happens during meiosis that ultimately results in a defect characterized by the deletion of chromosomes?
Nondisjunction occurs in too many cells or too few cells causing defects
What effects does nondisjunction have on the body if it occurs during mitosis What problems can an individual have if they have nondisjunction in somatic cells?
Autosomal nondisjunction is the most prolific cause of trisomy 21, or down syndrome, a defect that usually occurs during meiosis 1, but can occur during 2 as well.
Occurs during prophase 1 of meiosis?
Mistakes such as nondisjunction can occur during meiosis. This is the result of chromosomes failing to separate equally during either anaphase.
If nondisjunction occurs during meiosis?
It is the failure of chromosome pairs to separate properly during cell division.
What process does non disjunction occur in?
Nondisjunction occurs during anaphase, usually when referring to meiosis, when a tetrad fails to separate.
Occurs when homologous chromosomes do not separate in meiosis?
Nondisjunction occurs when homologous chromosomes do not seperate. -Amber ^-^
What occurs during nondijunction?
What occurs during nondisjunction
If nondisjunction occurs in meiosis II for one chromosome what will be the result at the completion of meiosis?
Some gametes may have an extra copy of some genes.
Why does nondisjunction happen?
Nondisjunction occurs during the Anaphase stage of Meiosis. In this stage, the sister chromosomes move to opposite sides of the cell. However, in Nondisjunction one or more set(S) of chromosomes move to the same side of the cell.
What stage of cell division would down's syndrome occur?
Down syndrome (trisomy 21) occurs when a gamete carrying an extra copy of chromosome 21 is involved in a fertilization event.The gamete (whether sperm or oocyte) has an extra copy of chromosome 21 because of something called NONDISJUNCTION. This happens when a chromosome gets pulled to the wrong daughter cell.This can happen either in meiosis I or meiosis II.If nondisjunction happens in meiosis I, 2 gametes will be n+1 (have the extra copy of 21) and the other 2 gametes will be n-1 (will have NO copy of 21)If nondisjunction happens in meiosis II, 2 gametes will be normal, one will be n+1 and one will be n-1.
