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Definition
| DNA & Protein in a coiled, rod- shaped form that occurs durin cell divison |
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Definition
2 identical parts of a chromosome.
-Held 2gether by a centromere |
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Definition
| Pairs of chromosome of same size, shape, & genetic content, one from each parent |
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Definition
Cells which have only 1 set of chromosomes
-Gametes (sperm &eggs), are haploid cells |
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Definition
| Cells having 2 sets of chromosomes ((homologous pairs present) |
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Definition
Repeating set of events that make up the life of a cell.
_Cycle includes:
1.Mitosis or meiosis
2.Cytokinesis
3.Interphase |
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Term
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Definition
Time between cell division
-Divide into G1,S,G2 be4 returning to mitosis/meiosis. |
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Definition
Process during cell division where the nucleus of a cell is divided into 2 nuclei
(Results in 2 indentical cells) |
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Definition
DNA forms chromosomes
NUcleolus & nuclear membrane brak down
Centrioles move to opposite ends of cell
Mitotic spindles form from spindle fibers |
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Definition
| Chromosomes move to center of cell w/ help of mitoic fibers |
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Definition
| sister chromtids separate, move to opposite poles of cell, centromere first. |
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Definition
Spindle fibers break down
Chromosomes return to chromatin
Nuclear envelopes & nucleolus reappear |
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Definition
| Division of the cytoplasm |
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Definition
| Special reproductive celss, haploid for sexual reproduction |
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Definition
Cellular respiration that produces gametes
-Daughter cells have 1/2 the chromosomes of parents |
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Definition
| Production of egg cells:1 egg & 3 unusable polar bodies are made |
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Definition
| Production of sperm ; 4 sperm are made |
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Definition
| When egg & sperm combine to make offspring |
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Definition
Single cell resulting from fertilization.
zygote divides from mitosis |
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Definition
Exchange of genes between homologous pairs
-Leads to genetic variation |
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Definition
| Segment of DNA that codes for a trait or characteristic for an organism |
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Term
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Definition
Chromosomes thicke
-Homologous pairs are tangled & crossing over may occur
-Nucleoli & nuclear envelope disappear
-Cell is 2n |
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Term
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Definition
Homologous chromosomes line up in a row
-cell is 2n |
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Definition
The random pairing & separation of homologous chromosomes
-Result in gene variation |
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Term
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Definition
Homologous pairs separate from each other
-Spindle fibers pull them to opposite sides
-There are still 2 sister chromtids
-Cell is 2n |
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Term
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Definition
Cytokinesis occurs
Nuclear envelope may form
-Cell is 1n |
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