BIO 111 Exam 4 ACTUAL Questions and
CORRECT Answers
In eukaryotic cells, the chromosomes are composed of ____. - CORRECT ANSWER -
DNA and Proteins
What is the final result of mitosis in a human? - CORRECT ANSWER - Genetically
identical 2n somatic cells
If there are 20 duplicated chromosomes in a cell, how many centromeres are there? - CORRECT
ANSWER - 20
The first gap in the cell cycle (G1) corresponds to ____. - CORRECT ANSWER - Normal
growth and cell division
In human and many other eukaryotic species cells, the nuclear membrane has to disappear to
permit _____. - CORRECT ANSWER - The attachment of microtubules to the
kinetochores
Metaphase is characterized by ______. - CORRECT ANSWER - Aligning of
chromosomes on the equator
During which phase of mitosis do the chromatids become chromosomes? - CORRECT
ANSWER - Anaphase
A cleavage furrow is _______. - CORRECT ANSWER - A groove in the plasma
membrane between daughter nuclei
Proto-oncogenes _______. - CORRECT ANSWER - Stimulate normal cell growth and
division
, Tumor-suppressor genes _____. - CORRECT ANSWER - Encode proteins that help
prevent uncontrolled cell growth
Which of the following defines a genome? - CORRECT ANSWER - The complete set of
an organism's genes and other DNA sequences
Asexual reproduction occurs during _____. - CORRECT ANSWER - Mitosis
At which stage of mitosis are chromosomes usually photographed in the preparation of a
karyotype? - CORRECT ANSWER - Metaphase
Which of the following is a true statement about sexual vs. asexual reproduction? - CORRECT
ANSWER - In sexual reproduction, individuals transmit half of their nuclear genes to each
of their offspring
A given organism has 46 chromosomes in its karyotype. Therefore, we can conclude that it must
_______. - CORRECT ANSWER - Have gametes with 23 chromosomes
Which of the following might result in a human zygote with 45 chromosomes? - CORRECT
ANSWER - An error in either egg or sperm meitotic anaphase
Homologous chromosomes _______. - CORRECT ANSWER - Carry information for the
same traits
If meiosis produces haploid cells, how is the diploid number restored for those organisms that
spend most of their life cycle in the diploid state? - CORRECT ANSWER - Fertilization
The human X and Y chromosomes _______. - CORRECT ANSWER - Include genes that
determine an individual's sex
CORRECT Answers
In eukaryotic cells, the chromosomes are composed of ____. - CORRECT ANSWER -
DNA and Proteins
What is the final result of mitosis in a human? - CORRECT ANSWER - Genetically
identical 2n somatic cells
If there are 20 duplicated chromosomes in a cell, how many centromeres are there? - CORRECT
ANSWER - 20
The first gap in the cell cycle (G1) corresponds to ____. - CORRECT ANSWER - Normal
growth and cell division
In human and many other eukaryotic species cells, the nuclear membrane has to disappear to
permit _____. - CORRECT ANSWER - The attachment of microtubules to the
kinetochores
Metaphase is characterized by ______. - CORRECT ANSWER - Aligning of
chromosomes on the equator
During which phase of mitosis do the chromatids become chromosomes? - CORRECT
ANSWER - Anaphase
A cleavage furrow is _______. - CORRECT ANSWER - A groove in the plasma
membrane between daughter nuclei
Proto-oncogenes _______. - CORRECT ANSWER - Stimulate normal cell growth and
division
, Tumor-suppressor genes _____. - CORRECT ANSWER - Encode proteins that help
prevent uncontrolled cell growth
Which of the following defines a genome? - CORRECT ANSWER - The complete set of
an organism's genes and other DNA sequences
Asexual reproduction occurs during _____. - CORRECT ANSWER - Mitosis
At which stage of mitosis are chromosomes usually photographed in the preparation of a
karyotype? - CORRECT ANSWER - Metaphase
Which of the following is a true statement about sexual vs. asexual reproduction? - CORRECT
ANSWER - In sexual reproduction, individuals transmit half of their nuclear genes to each
of their offspring
A given organism has 46 chromosomes in its karyotype. Therefore, we can conclude that it must
_______. - CORRECT ANSWER - Have gametes with 23 chromosomes
Which of the following might result in a human zygote with 45 chromosomes? - CORRECT
ANSWER - An error in either egg or sperm meitotic anaphase
Homologous chromosomes _______. - CORRECT ANSWER - Carry information for the
same traits
If meiosis produces haploid cells, how is the diploid number restored for those organisms that
spend most of their life cycle in the diploid state? - CORRECT ANSWER - Fertilization
The human X and Y chromosomes _______. - CORRECT ANSWER - Include genes that
determine an individual's sex
