How does nondisjunction during meiosis I differ from nondisjunction in meiosis II quizlet?
-Nondisjunction during meiosis I results in only two gametes, while nondisjunction during meiosis II gives four gametes, half of which have extra or missing chromosomes. -Half of the gametes from nondisjunction during meiosis II will have normal chromosome number.
How do the daughter cells differ when nondisjunction has occurred in meiosis I meiosis II?
Nondisjunction in meiosis I occurs when the tetrads fail to separate during anaphase I. … Nondisjunction in meiosis II results from the failure of the sister chromatids to separate during anaphase II. Since meiosis I proceeded without error, 2 of the 4 daughter cells will have a normal complement of 23 chromosomes.
When nondisjunction occurs during meiosis I when nondisjunction occurs during meiosis II?
If nondisjunction occurs during meiosis I, homologous chromosomes fail to separate. This produces abnormal gametes that contain two members of the affected chromosome or none at all. What happens if nondisjunction occurs during meiosis II? If nondisjunction occurs during meiosis II, sister chromatids fail to separate.
What is the difference between meiosis I and II quizlet?
Meiosis I is a reduction division where only one member of a homologous pair enters each daughter cell which becomes halploid. Meiosis II only splits up sister chromatids.
What is more similar to mitosis meiosis I or II quizlet?
Meiosis II is more like Mitosis than it is like Meiosis I. Mitosis is a process of cell reproduction (cell duplication). During this particular process, one cell engenders two genetically identical daughter cells.
How can you tell if nondisjunction occurs in meiosis 1 or 2?
Nondisjunction only results in gametes with n+1 or n–1 chromosomes. Nondisjunction occurring during meiosis II results in 50 percent normal gametes. Nondisjunction during meiosis I results in 50 percent normal gametes. Nondisjunction always results in four different kinds of gametes.
Which describes the cells at the end of meiosis 1 when nondisjunction occurs during meiosis 2?
One cell with extra homologous chromosomes and one cell missing a homologous chromosome. Which describes the cells at the end of meiosis I when nondisjunction occurs in meiosis II? The homologous pairs are in separate cells. The cells are haploid.
What is a major difference between meiosis II and mitosis?
The major difference between meiosis II and mitosis is the ploidy of the starting cell. Meiosis II begins with two haploid cells, which have half the number of chromosomes as somatic cells. This is because they will develop into gametes. Mitosis begins with a diploid cell.