Chp 8 HW
With the exception of gametes, a human cell contains __________ chromosomes.
46 (23 pairs)
An individual with a malignant tumor is said to have
Cancer
The most common type of cancer is a; this type always originates in tissues that line organs.
Carcinogena
Which of the following is a function of the cell cycle that, in eukaryotes, involves mitosis?
Cell replacement
During metaphase
Chromosomes line up on the midline of the cell
Chromatin consists of ______.
DNA and protein
Zookeepers at the Chester Zoo in England reported that a Komodo dragon laid a clutch of eggs that hatched into healthy young. The zookeepers claimed that the offspring were a result of asexual reproduction. What evidence confirms this claim?
DNA testing confirmed that all of the DNA of the Komodo dragon babies was derived from their mother.
The cell cycle is a series of events that occur in which order
G1, S, G2, mitosis, cytokinesis
A(n) ______ is an example of an organism that can sometimes reproduce asexually.
Komodo dragons
Looking through a light microscope at a cell undergoing meiosis, you see that the chromosomes have joined into XX-shaped tetrads. These tetrads are lined up along a plane that runs through the center of the cell. This cell is in ______?
Meiosis 1
is the spread of cancer cells from their site of origin to other sites in the body
Metastasis
How is sexual reproduction different from asexual reproduction
Sexual reproduction requires fertilization of an egg by a sperm
Which of the following is a stage of mitosis?
Telophase
During telophase
The events of prophase are reversed
Which of the following occurs during prophase?
The mitotic spindle begins to form.
Which of the following occurs during interphase?
Which of the following occurs during interphase?
Replication of chromosomal DNA occurs
before a cell divides
is a lump of abnormal cells that, although growing out of control, remains at its original site.
benign tumor
Asexual reproduction
can produce offspring genetically identical to the one single parent
Sister chromatids are joined at the
centromere
Most of an organism's DNA is carried by its
chromosomes
Meiosis starts with _____ cells and produces _____ gametes.
diploid ... haploid
Meiosis starts with a single diploid cell and produces
four haploid cells.
The _____ separate in meiosis I; the _____ separate in meiosis II.
homologous chromosomes ... sister chromatids
During prophase I of meiosis,
homologous chromosomes stick together in pairs.
A cell preparing to undergo meiosis duplicates its chromosomes during
interphase.
is an abnormally growing mass of cells that is actively spreading through the body
malignant tumor
The chromosomes of eukaryotic cells are found in the ______.
nucleus
Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following functions EXCEPT
production of sperm and eggs.
The correct order of events during meiosis is
prophase I, metaphase I, anaphase I, telophase I, cytokinesis, meiosis II.
During meiosis, segments of nonsister chromatids can trade places. This recombination of maternal and paternal genetic material is a key feature of meiosis. During what phase of meiosis does recombination occur?
prophase I.
Which of the following is the correct order for the four main stages of mitosis?
prophase, metaphase, anaphase, telophase
A benign tumor is a condition in which tumor cells __________.
remain confined to their original site
The function(s) of meiosis is/are?
reproduction (production of gametes)
A duplicated chromosome consists of two ______.
sister chromatids
Meiosis is typically accomplished in _____.
three steps. All of the chromosomes are duplicated in a diploid cell, and then there are two cell divisions to produce a total of four haploid gametes.
The mitotic cell cycle results in the production of ________.
two cells, each with the same amount of genetic material and the same genetic information