INTERPHASE, PROPHASE, METAPHASE, ANAPHASE, TELOPHASE Ch.10 11.7.15**
If a parent cell contains 6 chromosomes, the daughter cells will each contain how many chromosomes?
6
step 7- metaphase II-centromeres of chromosomes line up randomly at the equator of each cell.
During _____ chromosomes align single file along the equator of a haploid cell.
What is the complimentary strand of the following piece of DNA? CGGTACAATGTC
GCCATGTTACAG
2nd step-prophase I-pairing of homologous cohromosmes occurs. *each chromosome consists of 2 chormatids. *crossin over produces exchange of genetic information. *The nuclear envelope breaks down. *Spindles form
The first phase of meiosis I. During prophase I the replicated chromosomes condense, homologous chromsomes pair up, crossing over occurs between homologous chromosomes, the spindle is formed, and the nuclear envelope breaks apart into vesicles. Prophase I is the longest phase of meiosis.
step 9-telophase II *4 nuclei form around chromosomes. *spindles break down *cells divide
The fourth and final phase of meiosis II. Telophase II is identical to mitotic telophase, except that the number of chromosomes was reduced by half during meiosis. I.
3rd step-Metaphase I- * chromosome centromeres attach to spindle fibers *homlogous chromosomes. line up at the equator.
The second phase of meiosis I. the paired homologous chromsomes (tetrads) align at the center of the cell (the metaphase plate).
step 8- anaphase II- centromeres split. *centromeres split. *sister chromatids seperate & mover to oppsite poles.
The third phase of meiosis II. During anaphase II the sister chromatids are finally spearated at their centromeres and puled to opposite sides of teh cell. Note that anaphase II is identical to mitotic anaphase, excep the number of chromosmes was reduced by half during meiosis I.
step 6- Prophase II- Chromosomes condense. Spindles form in each new cell. Spindle fibers attach to chromosomes.
What happens in meiosis (stage II)? *divide the two haploid daughter cells (with two sister chromatids) into four haploid daughter cells
5th step- teleophase I- The spindles breakdown. Chromosomes uncoil & form 2 nuclei. The cell divides.
When does a new nuclear membrane form around the new nucleous in meiosis I.
Centromeres divide and chromatids separate.
anaphase
Single stranded chromosomes to opposite poles.
anaphase
The cell membrane begins to pinch together at the center of the cell.
anaphase
What is the separation of sister Chromoatids called?
chromosome segregation
4th step-Anaphase I- homologous chromosomes seperate & move to opposite poles of the cell.
homologous pairs separate and are pulled to opposite poles of the well
the chromosomes replicate forming double stranded chromosomes.
interphase
Chromosomes line up on the equator.
metaphase I
What are the errors found in DNA after replication is complete called?
mutations
What are the differences between plant and animal mitosis?
plant cells use cell plate to divide; have no centrioles or asters; stay connected after they divide, do not seperate from each other
Double stranded chromosomes become visable.
prophase
Nuclear membrane and nucleolus disappear.
prophase
The asters form.
prophase
The centromeres attach the double stranded chromosomes to the spindle fibers.
prophase
The double stranded chromosomes move toward the equator.
prophase/ metaphase
Cell divides into two new daughter cells.
telophase
Nuclear membrane and nucleolus reappear.
telophase
The cell plate is completely formed.
telophase
The single stranded chromosomes begin to relax, unwind, and become chromatin again.
telophase
What phase begins when the single stranded chromosomes reach the poles?
telophase
1st step-interphase-chromosomes replicate chromatin condenses.
*DNA is copied *A period between two mitotic or meiotic divisions during which the cell grows, copies its DNA, and synthesizes proteins *G1, S, G2
step 10 product
*four cells have formed. *each nucleus contains a haploid no. of chromosomes.
