During metaphase I, the homologous chromosomes are arranged in the center of the cell with the kinetochores facing opposite poles. The homologous pairs orient themselves randomly at the equator.
How does the arrangement of chromosomes in metaphase mitosis?
Metaphase. Chromosomes line up at the metaphase plate, under tension from the mitotic spindle. The two sister chromatids of each chromosome are captured by microtubules from opposite spindle poles. In metaphase, the spindle has captured all the chromosomes and lined them up at the middle of the cell, ready to divide.
What is the arrangement of chromosomes during metaphase II?
In anaphase I, the homologous chromosomes are separated. In prometaphase II, microtubules attach to the kinetochores of sister chromatids, and the sister chromatids are arranged at the midpoint of the cells in metaphase II.
What is the arrangement of chromosomes during metaphase II quizlet?
Terms in this set (39) What is the arrangement of chromosomes during metaphase? Sister chromatids align along the equatorial plane of the cell.
What is the arrangement of chromosomes?
Chromosome territories are known to be arranged radially around the nucleus. This arrangement is both cell and tissue-type specific and is also evolutionary conserved . The radial organization of chromosome territories was shown to correlate with their gene density and size.
What happens during metaphase of mitosis?
Metaphase is a stage in the cell cycle where all the genetic material is condensing into chromosomes. These chromosomes then become visible. During this stage, the nucleus disappears and the chromosomes appear in the cytoplasm of the cell. … As metaphase continues, the cells partition into the two daughter cells.
Where do chromosomes line up during metaphase?
Metaphase: During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.
What happens during metaphase II?
During metaphase II, the centromeres of the paired chromatids align along the equatorial plate in both cells. Then in anaphase II, the chromosomes separate at the centromeres. The spindle fibers pull the separated chromosomes toward each pole of the cell. … Cytokinesis follows, dividing the cytoplasm of the two cells.
What happens in metaphase I?
At metaphase I, the homologous chromosomes move to the center of the cell and orient themselves along an equatorial plane, forming the so-called metaphase plate. … The spindle fibers attach to the kinetochores of the centromere, preparing the chromosomal pair to be separated during the next phase, anaphase I.
What is the common feature found in metaphase metaphase I and metaphase II?
MEIOTIC METAPHASE I IS CHARACTERIZED BY THE HOMOLOGOUS CHROMOSOMES LINING UP AS PAIRS (DOUBLE FILE) ALONG THE EQUATOR. METAPHASE II OF MEIOSIS APPEARS SIMILAR TO MITOTIC METAPHASE, EXCEPT THAT THE NUMBER OF CHROMOSOMES IS THE HAPLOID NUMBER RATHER THAN THE DIPLOID NUMBER.
Which of the following processes contributes to genetic variation and occurs during metaphase I?
[One aspect of meiosis that generates genetic variation is the random orientation of homologous pairs of chromosomes at metaphase I. Each pair can orient with either its maternal or paternal homolog closer to a given pole; as a result, each pair sorts into daughter cells independently of every other pair.
During which stage of mitosis and or meiosis do homologs segregate see section 3.3 page 83?
During which stage of mitosis and/or meiosis do homologs segregate? At anaphase in mitosis and anaphase II in meiosis. The end result of meiosis is four haploid daughter cells.
What is a Nondisjunction quizlet?
Nondisjunction refers to the failure of pairs of chromosomes or sister chromatids to separate during meiosis or mitosis.
How are chromosomes arranged during this phase?
During metaphase chromosomes are arranged on a plane which is known as an equatorial plate. Metaphase is a stage in which the eukaryotic cell division takes place resulting in the alignment of chromosomes in the middle of the cell. The stages that take place before metaphase are prophase and prometaphase.
How does metaphase facilitate the proper distribution of chromosomes to the two daughter cells?
To sum it up, the metaphase plate is simply an imaginary plane that exists only during metaphase. It draws a line across the cell that is equidistant from both poles of the cell. This allows the chromosomes a place to be lined up on before they are pulled apart.
How is genotype expressed?
The genotype is expressed when the information encoded in the genes’ DNA is used to make protein and RNA molecules. The expression of the genotype contributes to the individual’s observable traits, called the phenotype.