Explain how the random alignment of homologous chromosomes during metaphase I contributes to the variation in gametes produced by meiosis. Random alignment leads to new combinations of traits. The chromosomes that were originally inherited by the gamete-producing individual came equally from the egg and the sperm.
What happens to chromosomes in metaphase 1 of meiosis?
In metaphase I, the homologous pairs of chromosomes align on either side of the equatorial plate. … Each daughter cell is haploid and has only one set of chromosomes, or half the total number of chromosomes of the original cell. Meiosis II is a mitotic division of each of the haploid cells produced in meiosis I.
What is the term for the random arrangement line up of homologous chromosomes during metaphase I?
The homologous chromosomes separate into different nuclei during meiosis I causing a reduction of ploidy level. … In metaphase I, the duplicated copies of these maternal and paternal homologous chromosomes line up across the center of the cell to form a tetrad. The orientation of each tetrad is random.
What happens to chromosomes during metaphase in meiosis?
During metaphase, the cell’s chromosomes align themselves in the middle of the cell through a type of cellular “tug of war.” The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.
What is it called when chromosomes line up randomly during metaphase?
Pairs of homologous chromosomes (tetrads) are lined up independently of each other (maternal and paternal chromosomes are also lined up on the metaphase plate at random). … Metaphase, and anaphase of Meiosis I are responsible for Gregor Mendel’s Principles of: segregation and independent assortment respectively.
What is the correct order of these meiotic events?
The correct order of mitotic events which occur during meiosis is: Formation of synaptonemal complex, recombination, separation of homologous chromosomes, separation of sister chromatids.
Do chromosomes line up at the metaphase plate of the cell in meiosis?
Meiosis II is the second division of meiosis. It occurs in both of the newly formed daughter cells simultaneously. Meiosis II is similar to Mitosis in that the sister chromatids are separated. … Metaphase II: During metaphase, each of the 23 chromosomes line up along the center of the cell at the metaphase plate.
What are the phases of mitosis?
Today, mitosis is understood to involve five phases, based on the physical state of the chromosomes and spindle. These phases are prophase, prometaphase, metaphase, anaphase, and telophase.
What is the difference between metaphase in mitosis and meiosis?
Hint: Meta means second and phase means stage, hence metaphase is the second stage of meiosis and mitosis. The disintegration of the nuclear envelope marks the beginning of metaphase.
Distinguish between metaphase of mitosis and metaphase I of meiosis.
|Metaphase of mitosis||Metaphase I of meiosis|
|Chromosome do not form loop||Chromosome forms loop.|