Biology 1050 Chapter 8

A(n) ________ is an example of an organism that can sometimes reproduce asexually by parthenogenesisKomodo 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 Eukaryota cells are found in thenucleus
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 occurs
The mitotic cell cycle results in the production of _________two cells, each with the same 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 metapahs, _______________chromosomes line up in the middle of the cell
Which of these events occurs during anaphase?sister chromatids become separate chromosomes
During telophase, ___________?the events of prophase are reversed
A cell that completed the cell cycle without undergoing cytokinesis would _______?have two nuclei
Cytokinesis typically begins during the ______ stages 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, and X chromosome, and one Y chromosome
What chromosomes belong to a normal human female?44 autosomes, and 2 X chromosomes
Chromosomes that do NOT determine the sex of an individual are called ________________autosomes
Sexual reproduction in humans _______________.allows a haploid sperm cell to fertilize a haploid egg cell
In meiosis, how does prophase I differ from propahse 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?four times 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 doe NOT occur in propahse 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 have the same number of chromosomes as the original cell 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 the but one of the following. Choose the exception.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
Crossing over during prophase I results in ________genetic recombination
A karyotype (a chromosome display) would be unable to determine ________.eye colour
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
Sexual reproduction appears to be absent in bdelloid rotifer. Which of these, if found in this group, would bring into question the idea that they reproduce ONLY asexually?cells in which meiosis occurs
Which of these describes the type of reproduction that is most adaptive in a rapidly changing
environment with many different parasitic diseases present?
sexual reproduction because the diversity of genotypes increases the likelihood that there is
one which can survive in a new environment