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Life 102

third test

QuestionAnswer
Cellular Organization of the GEnetic Material Genome, Chromosomes, somantic cells, gametes, chromatin, sister chromatids, centromere... etc.
Genome All the DNA in a cell constitutes the cell's
DNA molecules ina cell are packaged into Chromosomes
Somantic cells (nonreproductive have two sets of chromosomes
Gametes (reproductive cells) have half as many chromosomes as somatic cells
Eukaryotic chromosomes consist of chromatin a complex DNA and protein that condenses during cell division
sister chromatids seperate during cell division
centromere is the narrow "waist" of the duplicated chromosomes
Eukaryotic cell division consist of Mitosis, the division of the nucleus Cytokinesis, the division of the cytoplasm
interphase can be divided into subphases G1, S, and G2 (1st gap, synthesis, second gap)
Chromosome replication only happens in the S Phase
mitosis is divided into five phases (in order) Prophase, Prometaphase, Metaphase, Anaphase, Telophase (cytokenisis)
Mitotic spindle an apparatus of microtubules that controls chromosom movement during mitosis.
Centrosome the microtuble orginizing center, where spindle's come from. they replicate and go to polar parts of cell
Aster (a radial array of short microtubules.
metaphase plate a midway point between the spindles two points
Cleavage cytokineses in animals, by forming a cleavage furrow
Cell plate cytikinesis in plants.
binary fission Prokaryotic reproduction. the chromosomes replicate and the two daughter chromosomes actively move apart
Cell Cycle Control System regulated by both internal and external controls.
checkponts where the cycle stops until it gets another go ahead signal
growth factors proteins released by certain cells stimulate other cells to divide
density dependent inhibtion stop growth in crowded situations
anchorage dependence must be attached to a substratum too divide
Created by: paisleyswift
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