Biology 1201A Lecture Notes - Lecture 7: Spindle Apparatus, Sister Chromatids, G1 Phase

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lavenderturtle419

24 May 2016

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Binary fission: prokaryotic cell division splitting or dividing into two parts. Nucleoid: the central region of a prokaryotic cell with no boundary membrane separating it from the cytoplasm, where dna replication and rna transcription occur. Spindle: the structure that separates sister chromatids and moves them to opposite spindle poles. Meiosis: the division of diploid cells to haploid progeny, consisting of two sequential rounds of nuclear and cellular division. Mitosis occurs in regular cells in the body. Sister chromatids: one of two exact copies of a chromosome duplicated during replication. Chromosome segregation: the equal distribution of daughter chromosomes to each of the two cells that result from cell division. Interphase: the first stage of the mitotic cell cycle, during which the cell grows and replicates its dna before undergoing mitosis and cytokinesis. Interphase comprises three phases of the cell cycle: G1 phase, in which the cell carries out its function, and in some cases grows.

Related Questions

1- Most of a cell's life is spend in this phase of the cell cycle:

--------------------

2- The cell cycle is a highly regulated process.

True

False

3- Cells replicate their DNA during ________________ phase.

4- In animal cells, ________________________ is the indentation of the cell's surface that marks cytokinesis, the final splitting of the membrane, in the process of cell division.

cleavage furrow

binary fission

cell plate

sister chromatids

5- Somatic ("body") cells are _______________ (2n). This means there are two copies of each chromosome.

6- During the _______ phase(s) cells perform their everyday functions.

7- When chromosomes are duplicated the two strands are called _______________________________ and they are linked together at a point called the ____________________.

sister strands; kinetochore

sister chromatids; centromere

dual chromatids; centromere

genes; chromatid

8- New somatic âbodyâ cells are formed by this process:

meiosis

binary fission

replication

mitosis

9- The cytoplasmic division of a cell at the end of mitosis or meiosis, bringing about the separation into two daughter cells.

10- Cells replicate their DNA during ________________ phase.

pucecat917

5- Somatic ("body") cells are _______________ (2n). This means there are two copies of each chromosome.

6- During the _______ phase(s) cells perform their everyday functions.

7- When chromosomes are duplicated the two strands are called _______________________________ and they are linked together at a point called the ____________________.

sister strands; kinetochore

sister chromatids; centromere

dual chromatids; centromere

genes; chromatid

8- New somatic âbodyâ cells are formed by this process:

meiosis

binary fission

replication

mitosis

9- The cytoplasmic division of a cell at the end of mitosis or meiosis, bringing about the separation into two daughter cells.

10- Cells replicate their DNA during ________________ phase.

byzantiumlion207

Carefully read the following statements about cell division (1) After meiosis, the number of chromosomes in the newly formed cell is the same as that in the parent cell. Whereas, in mitosis, the chromosome number in daughter cell is reduced to half. (2) Cytokinesis is a highly regulated event in which cellular organelles are evenly distributed forming two daughter cells. (3) In Meiosis, DNA replication occurs only once whereas the cells divide twice and it is the mechanism that produces genetic variation in daughter cells. (4) In diplotene, chiasmata are formed between homologous chromosomes followed by crossing over and segregation of sister chromatids. (5)The kinetochore is a DNA protein complex which serves as the attachment point for spindle fibers. Which of the above statement or combination of statements is correct?

Biology 1201A Lecture Notes - Lecture 7: Spindle Apparatus, Sister Chromatids, G1 Phase

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