biology
What does meiosis produce?
4 haploid gametes
before mitosis begins which happens before the nucleus starts dividing
DNA replicates
before the process of mitosis can start----- must occur
DNA replication
which sequence of steps is the correct order for cellular division?
prophase metaphase anaphase telophase cytokinesis
which processes occur during interphase
protein synthesis and DNA replication
a unicellular organisms mitosis serves the purpose of
reproduction
Metaphase
second phase of mitosis, during which the chromosomes line up across the center of the cell
the cell cycle what occurs after interphase
separation of chromosomes into two daughter cells
during what stage of interphase do chromosomes make a copy of themselves
synthesis
which properly traces the movement chromosomes during mitosis?
Sister chromatids line up in the center of the cell and separate to opposite ends of the cell.
characteristic is present in Offspring produced by sexual reproduction but is missing in Offspring produced by asexual reproduction
an independent assortment of parent chromosomes
mitosis
cell division in which the nucleus divides into nuclei containing the same number of chromosomes
Prophase
first and longest phase of mitosis in which the genetic material inside the nucleus condenses and the chromosomes become visible
which is less likely to be a function of mitosis
gamete development
what is the result of crossing over during meiosis?
genetic variation
benefit of meiosis when compared to asexual reproduction
in meiosis there is greater genetic variety
which distinguishes mitosis from meiosis?
in mitosis 1 nuclear division occurs in meiosis two nuclear divisions occur
interphase is the longest stage of the cell cycle because
the cell grows and metabolizes and synthesizes more genetic material
what activities occurs during interphase?
the cell makes proteins and grows in size
undergoes mitosis but not cytokinesis
the cell would have two nuclei
G2 phase
The second gap, or growth phase, of the cell cycle, consisting of the portion of interphase after DNA synthesis occurs.
karoytype
A picture of all the chromosomes in a cell arranged in pairs relative to SIZE SHAPE AND NUMBER
in multicellular organisms mitosis serves the purpose of?
growth and development
Interphase
Cell grows, performs its normal functions, and prepares for division; consists of G1, S, and G2 phases
during which stage of the cell cycle would the rate of protein synthesis be the highest?
G1
during which phase of the cell cycle does growth occur?
Interphase
Chromatin
Substance found in eukaryotic chromosomes that consists of DNA tightly coiled around histones
Cytokinesis in animal cells
The cell membrane is drawn in until the cytoplasm is pinched into two equal parts. Each part contains its own nucleus and organelles.
the law of segregation predicts which phenomenon during gemete formation
a single random allele from each pair of parent Alleles will be passed on to the gamete
Meiosis
a type of cell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores.
which describes genetic information prior to the beginning of mitosis
chromatin
which structure do animal cells form during telophase and early cytokinesis
cleavage furrow
which stage precedes interphase
cytokinesis
which is true in both mitosis and meiosis
cytokinesis after nuclear division
which event occurs during cytokinesis
cytoplasm divides
cytokinesis in plant cells
divide from inside out using a cell plate in middle of cell. cell plate forms.
Cytokinesis
division of the cytoplasm to form two separate daughter cells
Anaphase
the third phase of mitosis, during which the chromosome pairs separate and move toward opposite poles
cells do not begin mitosis without passing several key checkpoints in interphase why are these checkpoints necessary
they ensure the DNA and organelles are properly replicated
what is the purpose of crossing over in meiosis
to create new combinations of alleles on homologous chromosomes
what is the result when a single cell reproduces by mitosis
two cells with genetic material identical to the parent cell
what are the end products of mitosis
two identical nuclei
S phase
The synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated.
what does mitosis create?
2 diploid somatic cells
Telephase
4th phase of cell division. the chromosomes become longer, thinner, and less distinct. the nucleur membrane forms. the neocleolus reappears and cell division is nearly complete
what form does DNA of the cell have during interphase?
Loosely wrapped around proteins forming chromatin
G1 phase
The first gap, or growth phase, of the cell cycle, consisting of the portion of interphase before DNA synthesis begins.
Stages of the cell cycle in order from beginning to end are?
interphase prophase metaphase anaphase telophase cytokinesis
sectional comes on breaks off and reattaches to the original chromosome in a reverse Direction which chromosomal mutation has most likely occurred
inversion
what would happen to a cell if cytokinesis occur?
it would divide
which of the following statement best explains the role of meiosis in reproduction?
meiosis makes it possible for zygote to have the correct number of chromosomes
why does meiosis promote genetic variability
meiosis undergoes two cell divisions producing haploid cells
which essential process do all multicellular organisms complete to create new tissue
mitosis
cytokinesis takes longer in plant cells than in animal cells because
plants have cell walls
