Cells/Life
what is the basic structural unit of life
cell
definition of mitosis
part of the cell cycle when replicated chromosomes are sepearted into two new nuclei
what is the product of meiosis
4 haploid gametes with 1/2 the number of chromosomes
homozygous means
the same
Haploid
1 set of chromosomes
lowest level of organization in life
atoms
what happens during metaphase of mitosis. BE SPECIFIC
when does crossing over occur in meiosis
prophase 1 of meiosis
nucleic acids are made up of
nucleotides
Diploid
2 sets of chromosomes
what characteristic of life involves a state of balance
regulated matabolism and homeostasis
What happens during anaphase of mitosis. SPECIFIC
the sister chromatids get pulled apart
what occurs during Anaphase 1 of meiosis
homologous chromosomes (tetrad) seperate and move to opposite poles
what part of the cell cycle is DNA replicated
Interphase - S phase
"N"
# of nonhomologous chromosomes that make up the entire genome
what major processes do cells do?
mitosis
membrane transport
cellular respiration
DNA mutations
signaling across membrane
draw a cell 2N=4 during metaphase of mitosis
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What is synapsis
pairs of homologous chromosomes form a tetrad
List the steps of the cell cycle in order
interphase - prophase - metaphase - anaphase - telophase - cytokinesis
Nondisjunction
gives rise to aneploid cells
List the 6 characteristics of life
cells
growth and development
metabolsim and homeostasis
respond to stimuli
reproduction
evolve and adapt
draw the product of a cell that was 2N=6 after it has gone through mitosis
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Draw Anapahse 1 of meiosis in a cell 2N=4
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difference between asexual and sexual reproduction
asexual- genetically identical offspring
sexual- genetically unique offspring
Locus
a genes specific position on a chromosome