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life science12/3/12

QuestionAnswer
what are 3 parts of cell division interphase, mitosis, cytokinesis
4 phases of mitosis prophase, metaphase, anaphase, telophase
a cell surrounded by a protected covering spore
when all the genes of a chromosomes but the chromosomes are still attached? sister chromatids
brief description of what takes place in prophase & metaphase prophase-chromosomes shorten and thicken becoming visible and nuclear membrane dissolves metaphase-the sister chromatids move to the center of the cell
when all the genes of a chromosomes but, the chromosomes are still attached? sister chromatids
4 types of asexual reproduction budding, spores, fission, regeneration
an organism carries on each of these types of reproduction name on for each budding, spores, fission, regeneration budding=hydra spores= bread mold fission= amoeba regeneration= planarian
one difference of sexual and asexual reproduction asexual= 1 parent sexual= 2 parents
two differences of meiosis and mitosis mitosis= 2 new cells meiosis= 4 new cells mitosis= 1 cell division meiosis= 2 cell divisions
why does regeneration not always result in asexual reproduction? Because if a lizard produces his tail after he loses it he doesn't produce offspring its just repair and replace*
the fibers that attach to sister chromatids pull to opposite ends of cell? spindle fibers
phase new nuclear membrane forms at the end of mitosis? telophase
this is the phase where the sister chromatids have separated anaphase
division of cytoplasm organelles cytokinesis
before a cell divides it makes a copy of its genes in interphase
what types of reproduction do the offspring receive genes both parents? sexual
process where egg and sperm unite sexual
process reproductive cell produced half the # of chromosomes of parent cell? meiosis
new organism is produced by body parts regeneration
end result of meiosis? 4 or 2 cells 4
what is a gene sections of a chromosome that have information needed to build the cell & cell parts
3 steps to cell division DNA replication Mitosis Cytokinesis
how many parents does each require in asexual and sexual reproduction asexual=1 sexual=2
are the offspring genetically identical to the parent or are they different a combination*
is mitosis or meiosis used in cell division? mitosis*
are reproductive cells required in mitosis? no
are reproductive cells required meiosis yes
fertilization definition is the joining of the two reproductive cells
your ------ carry all the information, or are a blueprint for building cells and cell parts. genes
genes of the cell are usually found stored on the ----------- located in the nucleus of the cell. chromosomes
the process of one cell dividing into two cells is called cell division
the process where the DNA makes an exact copy of itself is --- ---------- DNA replication
dna replication takes place during a phase in the cell cycle called? interphase
the process where the sister chromatids are evenly distributed in the two nuclei is called? mitosis
----------- is the stage of cell division where the cytoplasm and organelles are evenly distributed between the two new cells and the cells membrane pinches forming two new cells cytokinesis
why is it important the the chromosomes make exact copies of themselves before the cell divides? so that each cell would have a copy of the genes
what is prophase the nucleus disappears and chromosomes become visible
what is metaphase chromosome pairs line up in the center of the cell
what is anaphase chromosome pairs are tugged to opposite ends of teh cell
what is telophase chromosomes are at opposite ends and a nuclear membrane forms around each set of chromosomes
cytokinesis takes place during which phase of mitosis telophase
a type of reproduction by mitotic cell division is ------ reproduction asexual
genetically identical
the type of reproduction where the offspring are genetic combination of two parents is ------ reproduction sexual
in sexual reproduction the genetic material is doubled and then separated into single copies before it is given to the new cell-to-be through a process known as? meiosis
the joining of the two reproductive cells is a process called fertilization
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