Flashcards in Mitosis / Meiosis Deck (27):
discrete units of hereditary information consisting of double stranded DNA
The process in which single celled organisms divide into two daughter nuclei
What is the division of cytoplasm called?
What are the three stages of interphase?
G1, S, G2
What happens in G1?
cytoplasmic mass increases, new organelles are formed, and some organelles divide in 2
What happens in the S phase?
What happens in G2?
cells prepare for mitosis, Enzymes and other proteins are synthesized, centrioles divide and begin to move to opposite sides of the cell
What happens in the M phase?
the nucleus and cytoplasm divide
in which phase does the chromatin begin to coil and condense?
in which phase does the nuclear envelope break down and the nucleoli disappears?
In which phase does the chromatin form chromosomes?
In which phase does the spindle fibers extend between the centrioles and move the chromosomes to the center?
What happens to the spindle fibers and the chromosomes during late prophase?
the spindle fibers extend between the centrioles and the chromosomes move to center
where do double stranded chromosomes lie during metaphase?
What are the two sister chromatids held together by during metaphase?
how does Metaphase end?
with the centromere splitting
What happens during anaphase?
The sister chromatids separate and are pulled to opposite poles by spindle fibers.
What is a chromatid called after anaphase?
how does anaphase end?
when the chromosomes reach the poles
what begins when anaphase ends?
what happens during telophase?
the spindle begins to break down, chromosomes uncoil, new nuclear envelope forms
This forms during cytokenises in animal cells at the equator and it pinches the parent cell cytoplasm in two
in which phase does the centromere split?
in which phase do the sister chromatids separate?
what is the mass of DNA and proteins in an uncoiled state called?
where are centrioles located?
just outside the nucleus