220 likes | 355 Views
What term describes DNA in G1 phase?. Chromatin. What happens to the DNA in S Phase? What is DNA called?. Doubled, duplicated, copied Chromatin. What happens to DNA in G2? What is DNA called at the end of this phase?. DNA is coiled, condensed, and joined to its duplicate
E N D
What term describes DNA in G1 phase? • Chromatin
What happens to the DNA in S Phase? What is DNA called? • Doubled, duplicated, copied • Chromatin
What happens to DNA in G2? What is DNA called at the end of this phase? • DNA is coiled, condensed, and joined to its duplicate • Duplicated chromosome • Label the centromere. • Label the sister chromatids
What happens to centrioles and everything else in the cytoplasm during G2 phase? • Centrioles double • Everything doubles
How would you describe sister chromatids? • Joined, identical chromosomes
What is the first phase of mitosis? • prophase
What happens to the nuclear envelope during prophase? • dissolves
What is produced from the centrioles during prophase? • Spindle Fibers
Where do spindle fibers attach to chromosomes? • centromere
What happens by the end of prophase? • Centrioles have moved to opposite poles • Spindle fibers have attached to the centromere of the duplicated chromosomes
Name the second phase of mitosis. • Metaphase • What does “meta” mean? • middle
Where do chromosomes align themselves during metaphase? • At the equator
Name the third phase of mitosis. • Anaphase • What does “ana” mean? • To separate
What marks the beginning of anaphase? • Spindle fibers begin to separate duplicated chromosomes (sister chromatids)
What do we call the DNA being pulled towards the poles? • Unduplicated chromosomes
Name the fourth phase of mitosis. • Telophase • What does “telo” mean? • The end
What marks the beginning of telophase? • Unduplicated chromosomes have reached the poles
What happens to chromosomes during telophase? • Contained inside the nuclear membrane
What happens to spindle during telphase? • Break down
What happens to the nuclear envelope during telophase? • Two new nuclear envelopes form
How many nuclei are produced after mitosis? How many cells? • 2 nuclei • 1 cell
What happens during cytokinesis? • Everything outside the nucleus in the cytoplasm split into two separate cells