Term
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Definition
-cell grows and makes copy of its DNA
-prepares to split into two identical cells |
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Term
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Definition
-chromatin in nucleus condenses to make chromosomes
-centrioles move to different sides of nucleus
-spindle fibers form between the ends
-nucleus begins to breakdown
-chromosomes in nucleus are visible |
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Term
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Definition
-chromosomes line up in center of cell
-chromosomes attach to a spindle fiber at its centromere. |
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Term
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Definition
-centromeres split
-two chromatids seperate and become new chromosomes
-they move to opposite ends
-cell strtched out as the opposite ends are pushed apart |
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Term
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Definition
-chromosomes begin to stretch out
-a new nucleus forms in each region of chromosomes |
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Term
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Definition
-cell membrane pinches in around the middle of the cell
-cell splits in two
-each cell has an identical set of chromosomes and half of the organelles |
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Term
| What is a chromosome made of? |
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Definition
| A pair of chromatids held together by a centromere |
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Term
| What do chromosomes contain? |
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Definition
| Genes that have DNA for making proteins for development |
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Term
| EAch organism has a set number of what? |
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Definition
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Term
| How many chromosomes does a human have? |
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Definition
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Term
| What is the cell in the body that has two sets of chromosomes? |
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Definition
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Term
| What is the cell in the body that has only one set of chromosomes? |
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Definition
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Term
| How is cell division useful? |
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Definition
| Creating new cells,growth of an organism,reproduction |
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Term
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Definition
| A 3-part sequence that occurs from one cell division to another |
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Term
| What are the 3 parts of the cell cycle? |
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Definition
| Interphase,Mitosis,Cytokinesis |
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Term
| What is the first stage of cell division? |
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Definition
|
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Term
| What is duplicated before mitosis and meiosis? |
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Definition
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Term
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Definition
| It unwinds and unzips itself with an enzyme called DNA Helicase |
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Term
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Definition
| After Cytokinesis and before Mitosis |
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Term
| What stage is most of the life of a eukaryotic cell spent in? |
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Definition
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Term
| What is the second stage of the cell cycle? |
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Definition
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Term
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Definition
| The nucleus divides forming two identical nuclei |
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Term
| What is the product of Mitosis? |
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Definition
| Two identical cells with an identical number of chromosomes(diploid cell) |
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Term
| How many phases of Mitosis are there? |
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Definition
|
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Term
| What is the first phase of Mitosis? |
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Definition
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Term
|
Definition
-chromatin comes together to form chromosomes that are visible
-nucleus breaks down
-spindle fibers move out from the poles |
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Term
| What is the second stage of Mitosis? |
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Definition
|
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Term
| What occurs in Metaphase? |
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Definition
-Chromosomes line up in the middle of the cell
-Spindle fibers attach to cenromeres |
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Term
| What is the third stage of Mitosis? |
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Definition
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Term
|
Definition
-each centromere divides
-spindle fibers pull chromatids apart toward the poles |
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Term
| What is the fourth stage of Mitosis? |
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Definition
|
|
Term
| What occurs in Telophase? |
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Definition
-spindle fibers disappear
-chromosomes uncoil
-new nucleus is formed |
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|
Term
| What is the third stage of cell division? |
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Definition
|
|
Term
| What occurs in Cytokinesis? |
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Definition
| Cytoplasm divides to form two identical cells |
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Term
| Why is Cytokinesis different in plants? |
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Definition
| Because plants have cell walls that can't be divided. |
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Term
|
Definition
| type of cell division that gives you half the # of chromosomes as the parent cell |
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Term
| Where does Meiosis occur? |
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Definition
| In sex cells(haploid cells) |
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Term
| What are the phases of Meiosis? |
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Definition
|
|
Term
| What is the end result of Meiosis? |
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Definition
|
|
Term
| What are the steps of Meiosis? |
|
Definition
(same as mitosis)
I-Prophase
II-Metaphase
III-Anaphase
IV-Telophase |
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Term
| Why is Meiosis II different than Meiosis I? |
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Definition
| Meiosis II takes 2 cells from Meiosis I with no DNA replication |
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Term
| What are the stages of Meiosis II? |
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Definition
| (same as Mitosis and Meiosis) |
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Term
| What can happen if there is mistakes in Meiosis? |
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Definition
| Can produce sex cells with too many or too few chromosomes and often can cause sex cells to die (miscarriage) or disorders. |
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Term
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Definition
|
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Term
|
Definition
| A type of hereditary material that store information for structure and function of the organism |
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Term
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Definition
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Term
| Who made the model of DNA that we use today? |
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Definition
|
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Term
| What is the pattern of DNA called? |
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Definition
|
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Term
| How is DNA held together? |
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Definition
|
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Term
| What are the 4 bases of DNA? |
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Definition
Adenine
Guanine
Cytosine
Thymine |
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Term
| What does A always bond with? |
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Definition
|
|
Term
| What does C always bond with? |
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Definition
|
|
Term
| How many base pairs does a human have? |
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Definition
|
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Term
| What does DNA helicase do? |
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Definition
| It unwinds and unzips the DNA while free floating nitrogen bases attach to the complimentary. |
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