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15 terms

Mitosis, Meiosis, Cancer Test

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mitosis
nuclear division mechanism that occurs in somatic cells of multi-celled eukaryotes
meiosis
nuclear division mechanism that forms gametes or spores; basis of sexual reproduction; divides parental chromosome number in half
sister chromatid
one of two attached members of a duplicated chromosome
centromere
in chromosome the constricted region where microtubules of spindle bind
bipolar spindle
dynamic network of microtubules that grow from opposite poles of the cell
diploid
having two of each type of chromosome characteristic of the species
centrosome
includes two centrioles; two of them move to opposite poles of nucleus and pull apart sister chromatids
asexual reproduction
all offspring inherit the name number and kinds of genes from a single parent
sexual reproduction
involves meiosis; forms mature reproductive cells called gametes; then fertilization
genes
sequences of DNA that encode heritable information about traits
allele
arise by mutation and encode slightly different versions of the same trait
gametes
mature reproductive cells formed by meiosis of germ cells
homologous
pairing at meiosis and having the same structural features and pattern of genes; same length, shape, and genes
haploid
having one of each type of chromosome characteristic of the species
crossing over
process where chromosome and its homologous partner exchange corresponding segments