A(n) ______ is an example of an organism that can sometimes reproduce asexually.
komodo dragon
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 chromosomes of eukaryotic cells are found in the ______.
nucleus
Chromatin consists of ______.
DNA and protein
A duplicated chromosome consists of two ______.
sister chromatids
Sister chromatids are joined at the ______.
centromere
Which of the following occurs during interphase?
chromosome duplication
The cell cycle results in the production of ______.
two cells, each with the sam amount of genetic material and the same genetic information
Which of the following occurs during prophase?
the mitotic spindle begins to form
Which of the following is a stage of mitosis?
telophase
The correct sequence of stages of mitosis is ______.
prophase, metaphase,anaphase,telophase
During metaphase ______.
D) chromosomes line up in the middle of the cell
Which of these events occurs during anaphase?
A) Sister chromatids separate.
During telophase ______.
A) the events of prophase are reversed
A cell that completed the cell cycle without undergoing cytokinesis would ______.
D) have two nuclei
Cytokinesis typically begins during the ______ stage of mitosis.
telophase
What is the difference between a benign and a malignant tumor?
Benign tumors do not metastasize; malignant tumors do.
Which of the following will help prevent cancer and increase survival?
Seek early detection of tumors
Homologous chromosomes ______.
carry genes controlling the same inherited characteristics
What chromosomes belong to a normal human male?
44 autosomes, one X chromosome, and one Y chromosome
What chromosomes belong to a normal human female?
B) 44 autosomes and 2 X chromosomes
Chromosomes that do not determine the sex of an individual are called ______.
autosomes
Sexual intercourse in humans ______.
allows a haploid sperm cell to fertilize a haploid egg cell
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.
How much genetic material is present in a cell during prophase I compared to a cell that has completed meiosis II?
4x as much
during metaphase I
homologous chromosomes line up in the middle of the cell
Upon completion of telophase I and cytokinesis, there is(are) ______ cell(s).
two haploid
Which of the following is a characteristic seen in prophase I that does not occur in prophase II?
crossing over occurs
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
One difference between mitosis and meiosis is ______.
mitosis produces cells genetically identical to the parent cell, but meiosis does not
Genetic variation is accomplished by all but one of the following. Which is it?
the events of meiosis II
Which of the following is the best description of the events of anaphase I?
Homologous chromosomes randomly separate and migrate to opposite poles.
For a species with four pairs of chromosomes, ________ chromosome combinations are possible.
16
A ______ describes a site of crossing over.
chiasma
Crossing over during prophase I results in ______.
genetic recombination
A karyotype (a chromosome display) would be unable to determine ______.
eye color
How many chromosomes can a gamete possess as a result of nondisjunction?
n + 1 or n-1
How many chromosomes does an individual with Turner syndrome have?
2n-1