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46 Cards in this Set
- Front
- Back
Why don't cyanobacteria and bacteria reproduce by mitosis? |
they do not contain chromosomes |
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damaged cells of an organism are usually _______ by mitosis |
replaced |
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matched pairs of chromosomes are called |
homologous |
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all the chromosomes in a diploid cell are paired t/f |
true |
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how many chromosomes are produced by the first division of meiosis |
double the original |
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each chromosome usually contains _____ gene for a particular ______ |
one, trait |
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the proteins which are required to reproduce DNA during interphase are: |
enzymes |
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during a mutation, there's a mistake in the dna _______, and a __________ in the chromosomes
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ladder, copy error |
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phase during mitosis when dna separates into pairs of chromosomes is: |
prophase |
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forms the pole of the spindle apparatus |
centriole |
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membrane that surrounds the nucleus of the cell |
nuclear envelope |
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having chromosomes which occur singly, not in matched sets or pairs |
haploid |
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matched units of dna containing genetic information |
homologous chromosomes |
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produces daughter cells with less chromosomes than the parent cell |
meiosis |
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a system of fibers which go from one end of the cell to the other |
spindle apparatus |
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period of mitosis in which chromosomes move to opposite ends of the pole |
anaphase |
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method of cytokinesis in animals |
furrowing |
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threadlike substance in nucleus that carries genetic information |
chromatin |
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period when the cell is not engaged in division |
interphase |
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chromatin or chromosomes are duplicated during: |
s phase |
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cells that don't divide during mitosis |
gamete, bacterial cell |
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nuclear envelope disintegrates during |
prophase |
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cell plate is formed during _______ |
telophase |
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sperm cells are produced by ______ |
meiosis |
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chromosomes separate and move in different directions during: |
anaphase |
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type of cell division associated with the increase in size in weight |
mitosis |
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chromosomes are attached to the _________ during the metaphase of mitosis |
spindle fibers |
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two basic functions of meiosis |
maintain chromosome numbers through generations, produce new types of organisms |
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an adventitious bud would be formed on a : |
root |
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what organism produces conidia |
fungi |
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successful breeding is limited to the gametes of the same created "kinds" of organisms t/f |
true |
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condition common to protozoa where the cell acts as the gamete |
isogamy |
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gametangia are produced by gametes t/f |
false |
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eggs are motile t/f |
false |
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oogamy always involves fertilization from gametes of differing sizes t/f |
true |
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a zygote develops into a(n) _______ during early stages |
embryo |
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meiosis occurs shortly after fertilization |
haplontic life cycle |
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meiosis produces eggs and sperm |
diplontic life cycle |
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organisms having a haplontic life cycle would probably be |
isogamous |
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humans have a ________ life cycle |
diplontic |
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spores produced by the male cone of a pine tree are produced by |
meiosis |
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haploid generation |
gametophyte |
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a group of fern sporangia |
sorus |
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develops into a fruit; develops into a seed |
ovary; ovule |
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gameto. and sporo. appear to be the same |
isomorphic alterations of generations |
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stamen is made up of the ______ and ______ |
filament, anther |