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gen bio 2
  • Joshua Timbol

  • 問題数 47 • 8/25/2024

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  • 1

    This stage is named so because it is when the cell synthesizes a copy of its DNA in a very notable process called DNA replication.

    Interphase-S

  • 2

    This stage is named so because it is when the cell synthesizes a copy of its DNA in a very notable process called ______.

    DNA replication

  • 3

    -Continued growth and the production of materials that are necessary for cell division to occur -Protein synthesis but not at the rate similar to that of the G1 phase

    Interphase-Gap 2

  • 4

    They undergo meiosis

    Sex cells or gamete

  • 5

    They undergo mitosis.

    Somatic cells or non-sex cells

  • 6

    -is marked by the formation of a cleavage furrow in animal cells -is marked by the formation of a cell plate in plant cells

    Cytokinesis

  • 7

    can only occur once the genetic material is properly distributed to the daughter cells.

    Cytokinesis

  • 8

    ___ refers to how a cell divides to produce new cells.

    Mitosis

  • 9

    will only begin mitosis if the conditions are correct and favorable for cell division.

    Cell

  • 10

    check for errors.

    Cell cycle checkpoint

  • 11

    The Chromosome DNA in interphase is found in the form of ____ which condenses during mitosis.

    chromatin

  • 12

    Each chromosome is made up of two _____ ____.

    sister chromatids

  • 13

    The ____ has 23 pairs of chromosomes for a total of 46 chromosomes in each cell. 23 is the haploid number whereas 46 is the diploid number.

    human genome

  • 14

    23 is the ____ number

    haploid

  • 15

    46 is the ____ number

    diploid

  • 16

    ____ is often represented as n

    Haploid

  • 17

    While ____ is represented as 2n

    diploid

  • 18

    The number of sets of chromosomes that a cell or an organism has is known as ____.

    ploidy

  • 19

    All human body cells are diploid except ____ which are haploid.

    gametes

  • 20

    In animals, the boundary of the new cells is known as the ____.

    cleavage furrow

  • 21

    is not a phase of mitosis but is closely related to it.

    Cytokinesis

  • 22

    is the M phase that leads to the production of either sperm cells or egg cells. This type of division is very closely tied with the process of sexual reproduction.

    Meiosis

  • 23

    ___ involves the pairing of the members of homologous chromosomes so as to allow them to undergo crossing over and to segregate them.

    Synapsis

  • 24

    ____ is considered the reductional division in meiosis because it reduces the number of sets of chromosomes from two to one.

    Meiosis I

  • 25

    , by contrast, is considered the equational division in meiosis because there is no further reduction of the chromosome number in daughter cells.

    Meiosis Il

  • 26

    can be described according to the number of divisions, number of daughter cells, and the unique events that take place.

    Meiotic division

  • 27

    Applications of stem cell therapy range from genetic disorders to injuries.

    STEM CELL TECHNOLOGY

  • 28

    Meiosis produces new cell variants, and mitosis proliferates genetically modified cells.

    GENETIC ENGINEERING

  • 29

    Cells are usually limited by a certain number of times that they can divide before being too aged to further undergo mitosis. This limit is known as the ____.

    Hayflick limit

  • 30

    _____ is when the homologous chromosomes in the tetrads exchange segments. This is an event during meiotic division that allows recombination of genes, and ultimately, enhances genetic variation.

    Crossing Over

  • 31

    Cell Cycle Diseases and Disorder

    Cancer Nondisjunction disorders Mosaicism Alzheimer's disease Microcephaly Psychiatric diseases

  • 32

    A karyotype of a person with trisomy 21 (left) and a photo showing some of the distinct facial characteristics associated with _____ (right).

    Down's Syndrome

  • 33

    A karyotype of a person with trisomy 13 (left) and a photo showing some of the distinct facial characteristics associated with _____(right).

    Patau's syndrome

  • 34

    Skin discolorations are characterized by person with a ____ form of Klippel-Trénaunay syndrome.

    mosaicism

  • 35

    ____ is characterized by manic and depressive episodes.

    Bipolar disorder

  • 36

    is characterized by severe depressive episodes.

    Major depressive disorder

  • 37

    interferes with a person's sense of reality.

    Schizophrenia

  • 38

    If errors occur in the cell cycle, the cell will either attempt to compensate for the error through repair processes or undergo ___ if the errors cannot be repaired.

    apoptosis

  • 39

    The failure of the chromosomes or chromatids to separate properly is known as ____.

    nondisjunction

  • 40

    is primarily characterized by uncontrollable cell division which results in a neoplasm, which is an abnormal growth of the defective cells.

    Cancer

  • 41

    occurs when the cell has an abnormal number of chromosomes

    Aneuploidy

  • 42

    Chromosome condensation happens in ____. Spindle formation also begins.

    prophase

  • 43

    begins after the completion of the breakdown of the nuclear envelope.

    Prometaphase

  • 44

    involves the alignment of the chromosomes in the metaphase plate.

    Metaphase

  • 45

    The sister chromatids move to the opposite poles of the cell in .

    anaphase

  • 46

    ends when two nuclei are formed in the cell.

    Telophase

  • 47

    occurs when the cell has an abnormal number of sets of chromosomes

    polyploidy