Meiosis Flashcards
How many stages of Meiosis are their?
Two. Meiosis I and Meiosis II
What happens in Prophase I that is so important?
In Prophase I, Homologous chromosomes pair up and form Tetrads. ‘Crossing Over’ then occurs between the Tetrads which in turn is what controls how the kid may look and what he/she may inherit.
What happens during Interphase?
Nothing much happens. DNA begins to duplicate along with just around every other Organelle in the cell.
Metaphase I. What occurs?
The Tetrads line up across the equator of the cell. The centromeres that attach to the center.
What else that is important occurs in Metaphase I?
Random Assortment. Independent Assortment law states that the random orientation of these Tetrads in Metaphase I allow for the production of gametes with a variety of assortments of homologous chromosomes.
Anaphase I. What happens?
The Homologous Chromosome pairs get pulled apart towards separate poles.
What happens in the Telophase/Cytokinesis phase?
The cell splits into two haploid daughter cells.
What’s Meiosis II?
Meiosis II effectually is the splitting of those two haploid daughter cells which create 4 new haploid daughter cells.
What happens in Prophase II?
Same as in Mitosis just about.
What happens in Metaphase II?
The Chromosomes line up on the Spindle fibers as opposed to the equator. The Chromosomes in M2 are always lined up perpendicular to that of M1.
What happens in Anaphase II?
The Centromere gets split in two and the Chromatids (fancy for ‘Single-Stranded Chromosomes’) get moved towards opposite poles.
Telophase II and Cytokinesis (again). What is happening in this phase?
Four daughter haploid cells are over, signifying the end of the Meiosis cycle. Because each of these ‘Gametes’ retain half the amount of Chromosomes as a regular Diploid cell, we call them ‘Haploids’.
So, what happens now that Meiosis is done?
When the union between the two Gametes occur in a human, they form that union of 46 total Chromosomes. Because they have the proper amount, they just go through numerous cycles of Mitosis which forms the kid effectually.
