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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

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