BiSc Chapter 8 (Cellular Reproduction: Cells from Cells)
For a species with four pairs of chromosomes, ____chromosome combinations are possible.
16
How many chromosomes does an individual with Turner syndrome have?
2n -1
What chromosomes belong to a normal human female?
44 autosomes, 2 X chromosomes
What chromosomes belong to a normal human male?
44 autosomes, one X chromosome, and one Y chromosome
Sexual intercourse in humans...
Allows a haploid sperm cell to fertilize a haploid egg cell
Chromosomes that do not determine the sex of an individual are called...
Autosomes
What is the difference between a benign and a malignant tumor?
Benign tumors do not metastasize; malignant tumors do
Homologous chromosomes...
Carry genes controlling the same inherited characteristics
Sister chromatids are joined at the
Centromere
A___ describes a site of crossing over.
Chiasma
Which of the following occurs during interphase?
Chromosome duplication
During metaphase...
Chromosomes line up in the middle of the cell
Which of the following is a characteristic seen in prophase I that does not occur in prophase II?
Crossing over occurs
Nucleosomes are made of...
DNA and histone proteins
Chromatin consists of
DNA and protein
In meiosis, how does prophase I differ from prophase II?
During prophase I there is one diploid cell; during prophase II there are two haploid cells
A karyotype (a chromosome display) would be unable to determine____.
Eye color
How much genetic material is present in a cell during prophase I compared to a cell that has completed meiosis II?
Four times as much
Crossing over during prophase I results in...
Genetic recombination
A cell that completed the cell cycle without undergoing cytokinesis would...
Have two nuclei
During metaphase I...
Homologous chromosomes line up in the middle of the cell
Which of the following is the best description of the events of anaphase I?
Homologous chromosomes randomly separate and migrate to opposite poles
A(n)_____ is an example of an organism that can sometimes reproduce asexually.
Komodo Dragon
One difference between mitosis and meiosis is...
Mitosis produces cells genetically identical to the parent cell, but meiosis does not
Amanda's abnormal number of sex chromosomes resulted from
Nondisjunction
The chromosomes of eukaryotic cells are found in the
Nucleus
Plant cell cytokinesis differs from animal cell cytokinesis because
Plant cells form a cell plate and animal cells do not
Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following EXCEPT
Production of sperm and eggs
The correct sequence of stages of mitosis is
Prophase, Metaphase, Anaphase, Telophase
Which of the following will help prevent cancer and increase survival?
Seek early detection of tumors
A duplicated chromosome consists of two
Sister chromatids
Which of these events occurs during anaphase?
Sister chromatids separate
Cytokinesis typically begins during the ___ stage of mitosis
Telophase
Which of the following is a stage of mitosis?
Telophase
Anaphase II is essentially the same as mitotic anaphase except that in anaphase II____and in mitotic anaphase_____.
The cells are haploid and sister chromatids separate...the cells are diploid and sister chromatids separate
During telophase...
The events of Prophase are reversed
Genetic variation is accomplished by all but one of the following. Which is it?
The events of meiosis II
Which of the following occurs during prophase?
The mitotic spindle begins to form
The cell cycle results in the production of
Two cells, each with the same amount of genetic material and the same genetic information
Upon completion of telophase I and cytokinesis, there is (are)___cell(s).
Two haploid
With respect to her sex chromosomes, Amanda would be designated as ___.
XO
How many chromosomes can a gamete possess as a result of nondisjunction?
n + 1 or n-1
