Term
| The DNA in the chromosomes of eukaryotes is associated with various proteins, uncluding _____that are especially involved in organizing chromosomes. |
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Definition
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Term
| When a eukaryotic cell is not undergoing division, the DNA within a nucleus is a tangled mass of thin threads called _____. |
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Definition
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Term
| What happens to chromatin before mitosis begins? What is easy to see? |
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Definition
| it becomes highly coiled and condensed, and it is is easy to see the individual chromosomes |
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Term
| How many chromosomes do human cells contain? corn? goldfish? |
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Definition
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Term
| What does the diploid number include? |
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Definition
| two chromosomes of each kind |
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Term
| Half the diploid number, called the ______contains only one chromsome of each kind. |
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Definition
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Term
| The dividing cell is called the_____and he resulting cells are called the ______. |
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Definition
| parent cell; daughter cells |
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Term
| Before nunclear division takes place, the DNA replicates, ______. |
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Definition
| duplicating the chromosomes in the parent cell |
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Term
| Sister chromatids are cinstricted and attached to each other at a region called the_____. |
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Definition
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Term
| Protein complexes called _____develop on either side of the centromere during cell divison. |
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Definition
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Term
| What are the seven phases of the cell? |
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Definition
| interphase, prophase, prometophase, metaphase, anaphase, telephase, and cytokinesis |
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Term
| What happens during interphase? |
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Definition
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Term
| During prophase, the chromosomes _____and become_____. _____dissolve the membrane to separarate the chromatids. And ____move to opposite sides of the cell. |
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Definition
| coil up and become visible; nuclear enzymes; centrisomes |
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Term
| What happens during prometophase? |
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Definition
| the spindle fibers attach to centromere tot he kinetochore |
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Term
| During metaphase,_____move to the line up in the middle. |
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Definition
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Term
| What happens during anaphase? |
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Definition
| the chromosomes separate and the centromere move to opposite sides |
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Term
| During telephase, chromsomes arraive at opposite sides and the the spindle fibers disappear and a _____reforms around the chromosomes on opposite sides and the chromosomes _____. |
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Definition
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Term
| An imaginary plane that is perpendicular and passes through this circle is called the _____. |
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Definition
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Term
| what is the result when mitosis occurs but cytokinesis doesn't occur? |
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Definition
| a multinucleated cell forms |
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Term
| What is the name for the division of the cytoplasm? |
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Definition
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Term
| Where does cytokinesis begin and continue into? When does it reach completion? |
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Definition
| begins in anaphase and continues in telophase; does not reach completion until the following interphase begins |
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Term
| In animal cells, a ____which is an inentation of the membrane between the two duaghter nuclei begins as anaphase draws close. |
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Definition
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Term
| the cleavage furrow deepens when a band of actin filaments, called the _____, slowly forms a circular constriction between the two duaghter cells. |
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Definition
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Term
| What does cytokinesis involve that does not occur in animal cells? |
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Definition
| the building of a new cell wall between the daughter cells |
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Term
| The _____is simply newly formed plasma membrane that expands outward until it reaches the old plasma membrane and fuses with this membrane. |
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Definition
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Term
| ____permits growth and repair. |
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Definition
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Term
| Cytokinesis in animal cells is accomplished by a _____. |
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Definition
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Term
| in flowering plants, ______retains the ability to divide throughout the life of a plant. |
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Definition
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Term
| What are the two types of cloning? |
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Definition
| therapeutic and reproductive |
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