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cell reproduction

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telophase
spindle fibers start to disappear, nucleur membrane forms, and cytoplasm begins to divide
prophase
chromatis pairs are fully visible, the nucleoluus and the nuclear memebrane disintegrate, and spindle fibers begin to form
metaphase
chromatid pairs line up across center of the cell the centromemre of each pair attaches to spindle fibers
anaphase
each chromatid pair splits at the centromere and seperates to opposite ends of the cell where they become identical chromosomes
interphase
cell grows and makes copies of its hereditary material.
mitosis
process in which nucleus divide to form two new nuclei
chromosome
structure in the ucleus that contains hereditary material
asexual reproduction
budding fission regeneration
fission
when an organism with no nucleus divides into 2 identical oraganisms
budding
A Small exact copy of the adult grows from body to parent
regeneration
a wole new organism grows from each piece of parent
sexual reproduction
two sex cells,usually an egg and a sperm,come together
fertilization
the joining of sperm and egg
sperm
sex cell in the male reproduction system
egg
sex cell in the female reproduction system
diploid
human body cells are ...
haploid
human sex cells are...
meiosis
process that produces haploid sex cells and ensures that offspring have the same diploid number as its parent
meiosis1
the nucleus divides and produces two neww cells with one duplicated chromosome each
meiosis2
the nuclei divide and the chromatids seperate, producing sex cells with half the number of chromosomes of the original nucleus
dna
a code that contains info that an organism needs to grow and function
crick
made an accurate model of dna in 1953
twistedladder
a dna is similar
sugarphosphate molecules
the sides of the ladder is made up of...
nitrogen bases
the rungs on the ladder are made up of...
genes
sections of dna on a chromosome
rna
carrie the code for making proteins from the nucleus to ribosomes in the cytplasm
mutation
any permanent change in the dna sequence of a cell's gene by that cell.can be caused by factors like x-rays.sunlight,and some chemicals