BIOL201 Lecture Notes - Lecture 20: Dynein, Purine, Applied Digital Data Systems
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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.
G
S
Q
M
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.
S
M
Q
G
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.
S
Q
G
M
6.A) If one follows 120 primary oocytes in an animal through their various stages of oogenesis, how many secondary oocytes would be formed?
B) How many first polar bodies would be formed?
C) How many ootids would be formed?
D) If one follows 120 primary spermatocytes in an animal through their various stages of spermatogenesis, how many secondary spermatocytes would be formed?
E) How many spermatids would be formed?
14. From which phase of the cell cycle does a cell enter G0 phase
21. Which of the following is true about the second meiotic division?
-The products are four identical gametes.
-Homologous chromosomes are pulling apart.
-Nondisjunction would lead to extra bivalents forming.
-Synapsis occurring in the second meiotic division.
-Sister chromatids are pulling apart.
23.Which if the following is true?
-Cells are 4n after S phase. |
-Sister chromatids in mitosis are not identical. |
-Cells are considered to be 2n after meiosis I. |
-A chromosome always contains the same number of chromatids, regardless of phase of the mitotic or meiotic cell cycle. |
-A chromosome may contain one or two chromatids in different phases of the mitotic or meiotic cell cycle. |