Why does a diploid mother cell that undergoes meiosis produce four haploid cells? Explain what happens during meiosis (i.e. what events take place during meiosis) that helps achieve this goal (four haploid cells). What are two ways that meiosis contributes to genetic recombination?
What happens during prophase I? During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed...
In any case, in theprophaseportion of mitosis, which is the longest of the five mitotic stages, the nuclear envelope disintegrates and the nucleolus within the nucleus disappears. A structure called thecentrosomedivides, and the two resulting centrosomes move to opposite sides of the cell, in a...
Like mitosis, meiosis also has distinct stages called prophase, metaphase, anaphase, and telophase. A key difference, however, is that during meiosis, each of these phases occurs twice — once during the first round of division, called meiosis I, and again during the second round of division,...
What happens to centrioles during prophase? Describe multiple details of how mitosis in animal cells differs from mitosis in plant cells. What cell part controls the process of mitosis? What is the purpose of cell division? What is the role of the centrioles in cell div...
The homologous pairs of chromosomes find and line up next to each other, and then something amazing happens: recombination. Recombination (aka “crossing over”) is the process that makes prophase I so special. It’s essentially a scrambling-around of genetic material that introduces some variation...
The cell cycle is the process by which cells multiply, which is necessary for an organism to survive. Bacteria, like other prokaryotic cells, multiply through **binary fission, but in cells with a nucleus, like those in humans and animals, replication happens throughmitosis or meiosis**. ...
Mitosis is a process that happens in phases thatalwaysoccur in the same order and accomplish the same tasks (unlesssomething goes wrong!).The four phases of mitosis are prophase (P), metaphase (M), anaphase (A), and telophase (T).Each of these phases helps achieve the purpose of mitosis...
What would happen if gametes were produced by mitosis instead of meiosis? Describe what happens to the chromosomes in the following stage of Mitosis: Cytokinesis. What is cytokinesis and when does it occur? What basically happens during prophase, metaphase, anaphase, and telophase? Explain what hap...
Synapsis is the pairing of homologous chromosomes prior to their separation into daughter cells. It is also known as syndesis. Synapsis occurs during prophase I of meiosis I. In addition to stabilizing the homologous chromosomes so they separate correctly, synapsis facilitates the exchange of genetic...