Mitosis
What happens during interphase?
With its extra organelles, proteins, and chromosomes is ready for the four phases of mitosis
What happens in start?
Start: Meiosis has doubled its number of chromosomes and its cytoplasmic proteins and organelles.
Why is meiosis split into meiosis I and II?
It goes through PMAT twice [Prophase, metaphase, anaphase, and telophase twice] The first time the chromosomes do not unravel.
How many homologous pairs do you have?
22
Who is this?
Eli ponivas :0
What happens in prophase?
Centrosomes are carried to ends of the opposite sides of the cytoplasm by protein motors. The centrosomes then assemble fibers from the cytoskeleton into a structure called the mitotic spindle. The mitotic spindle will align and separate chromosomes in later phrases.
What happens in prophase I and metaphase I?
Prophase I: Membrane around the nucleus dissolves, each chromosomes joins with its homologous chromosome to form a tetrad. Chromosomes called over crossing over.
Metaphase I: The spindle when homologous chromosomes line up along the equator of the cell.
In which phase of meiosis is genetic information exchanged between chromosomes
Prophase 1
In which stage of the cell cycle is the preparing itself to divide
Interphase
What is april, tony, guli, and kalin's favorites of colors?
April and Tony: Purple
Guli: Pink
Kalin: Orange
What happens in metaphase?
The fibers of the mitotic spindle attach to proteins on the centromere of each chromosome. These fibers pull chromosomes to align them along a line called the equatorial plane.
What happens in anaphase I and telophase and cytokinesis?
Anaphase I: The paired homologous chromosomes would separate from each other and move to opposite ends of the cell as the kinetochore microtubules shorten.
Telophase and Cytokinesis: Telophase is followed by cytokinesis, or the division of the cytoplasm into two daughter cells.
Give two differences between anaphase I and anaphase II in meiosis
Anaphase I has one cell, and anaphase II has two cells. The tetrad splits in anaphase I, and in anaphase II, the centromere splits. Anaphase 1 separates the tetrads and pulls whole chromosomes toward the centrosomes. Anaphase 11 pulls the chromatids toward the centrosome and the centrosomes split.
A single muscle cell can contain dozens of nuclei. Which stage of the cell cycle is not completing? How do you know?
Cytokinesis because if the cell has gone through cytokinesis it would only have one nucleus.
how many toenail beds does kalin have
8
The centromeres, which hold two chromatids of each chromosome together, send out a signal that splits the centromeres in half and pulls the chromatids toward the centrosomes.
What happens in prophase II and metaphase II?
Prophase II: In each of the daughter cells, a new spindle apparatus forms, the nuclear envelope breaks down, and the chromatin condenses into chromosomes again.
Metaphase II: The spindle fibers align chromosomes on the equatorial plane.
Which type of cell division turns a diploid cell into a haploid cell?
Meiosis
During which phase of mitosis do the centromeres split?
Anaphase
What happens in telophase?
The chromatids are now their own chromosomes and the nucleus begins to reform around them. In the nucleus reassembles and the chromosomes uncoil to become chromatin again. In the cytoplasm, the mitotic spindle disassembles. Cytokinesis begins.
What happens in anaphase II and telophase II and cytokinesis?
Anaphase II: The chromosomes centromeres split, and the spindle pull the chromatids towards the centrosomes
Telophase II and cytokinesis: In telophase II, nuclear membranes form around each set of chromosomes, and the chromosomes decondense. Cytokinesis splits the chromosome sets into new cells
What's the difference between asexual and sexual reproduction?
Asexual: One Parent cell; Process that produces offspring genetically identical to their parents.
Sexual: Two parent cells; Two haploid cells join to form a genetically different diploid zygote.
During which phase of mitosis does the mitotic spindle assemble? In which phase does it disassemble?
Prophase and telophase