CONTINUITY OF CELLS Flashcards
Draw a diagram that is the summary of the cell cycle?
pg 91 of the textbook.
What are the stages of the cell cycle?
Interphase, prophase, metaphase, anaphase, telophase, cytokinesis.
What is the process of mitosis?
Prophase, metaphase, anaphase, telophase and cytokinesis.
Explain prophase?
Nucleus becomes condensed, chromosomes become more visible, nucleolus disappears, centrioles move to opposite ends of the cells.
Explain metaphase?
Chromosomes are aligned in the equator of the cell.
Explain anaphase?
Two chromatids of each chromosome are pulled to opposite ends of the cell.
Explain telophase?
sister chromatids are on other ends of the cells so the chromosomes decondense (less visible), nucleus reappears, nuclear membrane reforms, spindle disappears.
Explain cytokinesis?
cell divides forming two daughters cells
animal cells - cleavage furrow forms splitting the cell in two.
plant cells - cell plate is laid down at center of cell.
Explain meiosis?
A diploid cell will produce another diploid cell, necessary in organisms that carry out sexual reproduction to maintain consistency of chromosome number, produces haploid cells.
How does meiosis differ from mitosis?
Meiosis only takes place in reproductive organs.
Involves two divisions resulting in daughter cells.
chromosome arrangements in daughter cells are both different from each other and from parent cells.
How many stages are there in meiosis?
2, meiosis 1 and meiosis 11
What is visibly different in meiosis 1 and meiosis 11?
In meiosis 1 there are there are four sets of chromosomes initially and in meiosis 11 the sets of chromosomes are divided in two.
What is crossing over?
When two sister chromatids break and exchange sections with each other, points when chromosomes cross over are called chiasmata.
Draw a diagram of crossing over?
Pg 100 and 101 in the textbook.
Draw a diagram of crossing over?
Pg 100 and 101 in the textbook.
