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28 terms

Mitosis and Meiosis

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anaphase
mitotic stage where chromosomes separate at the centromeres
asters
microtubles and fibers that radiate our from centrioles
asexual reproduction
reproduction involving only one parent
blastula
hollow ball of cells formed during the early stages of embryological develpoment
centromere
part of the chromosomes where the chromatids are joined together
centriole
in animal cells, a cytoplasmic organelle that organizes the mitotic spindle fibers during cell reproduction
chromatid
one of the two strands that make up chromosomes
chromatin
the coils of DNA and protein that condense to form chromosomes
chromosome
distinct wormlike structures formed from chromatin during cell reprduction
crossing-over
an exchange of chromosomal material between homologus pairs
cytokenesis
cytoplasmic divison that follows division of the nucleus
diploid
having two of each chromosome
DNA replication
the process of doubling the DNA that occurs before mitosis
germ cells
the only cells that can undergo miosis, found in sex organs
haploid
half the number of diploid chromosomes
homologous pair
in diploid cells, a pair of identical chromosomes
meiosis
cell division to produce sex cells
metaphase
the stage of mitosis where duplicated chromosomes line up along the center of the mitotic spindle
microtubules
tiny tubes that make up most of a cell's cytoskeleton
mitosis
dupication and division of chromosomesand nucleus during cell reproduction
oogenesis
the meiotic process that results in the formation of eggs
ovum
one egg
polyploid
having more than the diploid number of chromosomes
prophase
the first stage of mitosis when chromosomes form chromatin and the nuclear membrane is absorbed
reduction division
cell division that occurs in meiosis and results in haploid cells
sexual reproduction
reproduction requiring two parents
somatic cells
body cells, (cells other than germ cells)
spermatogenesis
the meiotic process that results in the formation of sperm cells