BIO 340 Exam 1 questions Questions And
Answers With Verified Solutions Graded A+ Latest
Update 2025.
Mitosis - ANSWER -Creates two daughter cells IDENTICAL to parent.
-Happens in Somatic cells
-Parent cells is diploid (2n). So if there are 3 pairs of chromosomes 2n=6.
Human karyotpye is 2n=46
What is function of mitosis and meiosis? - ANSWER They ensure the genetic continuity of
nucleated cells
What are the phases of the cell cycle? - ANSWER G1: growth and metabolism
S: DNA synthesis and chromosome duplication
G2: preparation for mitosis
M: Divison
Steps of Mitosis - ANSWER IPMAT
1. Interphase
2. Prophase
3. Metaphase
4. Anaphase
5. Telophase
6. Cytokinesis
Interphase (Mitosis) - ANSWER Chromosomes duplicate to produce sister
chromatids.
,Prophase (Mitosis) - ANSWER -Chromosomes become paired chromatids and are
visible.
-The nuclear envelope also disappears.
-Duplicated chromosomes condense
Metaphase (Mitosis) - ANSWER Chromosomes line up in the middle of the cell
and attach to spindle fibers.
Anaphase (Mitosis) - ANSWER Chromosomes are pulled apart from each other
and towards the poles of the spindle
Telophase (Mitosis) - ANSWER -the chromosomes have reached the opposite
ends of the cell and the nuclear envelope starts developing and separating
the chromosomes into two new cells
-Chromosomes de-condense
Cytokinesis (Mitosis) - ANSWER the final stage where the two cells actually
separate.
What is present before replication (Mitosis)? - ANSWER -1 chromosome
-1 chromatid
-1 piece of DNA
What is present after replication (Mitosis)? - ANSWER -1 chromosome
-2 chromatids
-2 pieces of DNA
What are sister chromatids? - ANSWER Identical copies
At which points in the cell cycle will you likely not see chromosomes but
uncondensed DNA?
i. During Gap 1
ii. During Synthesis
iii. During gap 2
iv. All of the above - ANSWER iv. All of the above
Where are genes located? - ANSWER -On chromosomes
-Each chromosome has a distinct set of genes in specific locations
, What is the number of chromatids in an organism with 4 chromosomes in G1 and G2? - ANSWER
-G1: 4 chromatids
-G2: 8 chromatids
What are characteristics of eukaryotic chromosomes? - ANSWER -DNA carries the genes
-The molecule is linear
-Most of the time it is present in the cell in its uncoiled form associated with
proteins and RNA (chromatin)
-Its fragile and diffuse, which is a problem for cell division
--The solution for this is to package by multiple condensation
How many centrioles do centrosomes in animal cells have? - ANSWER 2
Microtubules - ANSWER -form around the centrosomes
-build the spindle
apparatus
-some attach to the kinetochores which are on the
centromeres of chromosomes during cell division.
-They help pull
the chromosomes apart during anaphase
Chromatin - ANSWER -the DNA that makes up a chromosome
-Chromosomes are the pieces of DNA made up of chromatin
Chromatids - ANSWER the identical pieces of DNA held together by
centromeres
Meiosis - ANSWER -has two parts! In the end you get four haploid cells that are unique
- Required for the process of each parent contributing one set of homologs to offspring
What are most animals and plants (Haploid, Diploid, etc)? - ANSWER -Diploid, they have 2
homologous copies of each chromosome
-One copy is inherited from the mother, the other from the father
When is the DNA copied? - ANSWER In phase S
Answers With Verified Solutions Graded A+ Latest
Update 2025.
Mitosis - ANSWER -Creates two daughter cells IDENTICAL to parent.
-Happens in Somatic cells
-Parent cells is diploid (2n). So if there are 3 pairs of chromosomes 2n=6.
Human karyotpye is 2n=46
What is function of mitosis and meiosis? - ANSWER They ensure the genetic continuity of
nucleated cells
What are the phases of the cell cycle? - ANSWER G1: growth and metabolism
S: DNA synthesis and chromosome duplication
G2: preparation for mitosis
M: Divison
Steps of Mitosis - ANSWER IPMAT
1. Interphase
2. Prophase
3. Metaphase
4. Anaphase
5. Telophase
6. Cytokinesis
Interphase (Mitosis) - ANSWER Chromosomes duplicate to produce sister
chromatids.
,Prophase (Mitosis) - ANSWER -Chromosomes become paired chromatids and are
visible.
-The nuclear envelope also disappears.
-Duplicated chromosomes condense
Metaphase (Mitosis) - ANSWER Chromosomes line up in the middle of the cell
and attach to spindle fibers.
Anaphase (Mitosis) - ANSWER Chromosomes are pulled apart from each other
and towards the poles of the spindle
Telophase (Mitosis) - ANSWER -the chromosomes have reached the opposite
ends of the cell and the nuclear envelope starts developing and separating
the chromosomes into two new cells
-Chromosomes de-condense
Cytokinesis (Mitosis) - ANSWER the final stage where the two cells actually
separate.
What is present before replication (Mitosis)? - ANSWER -1 chromosome
-1 chromatid
-1 piece of DNA
What is present after replication (Mitosis)? - ANSWER -1 chromosome
-2 chromatids
-2 pieces of DNA
What are sister chromatids? - ANSWER Identical copies
At which points in the cell cycle will you likely not see chromosomes but
uncondensed DNA?
i. During Gap 1
ii. During Synthesis
iii. During gap 2
iv. All of the above - ANSWER iv. All of the above
Where are genes located? - ANSWER -On chromosomes
-Each chromosome has a distinct set of genes in specific locations
, What is the number of chromatids in an organism with 4 chromosomes in G1 and G2? - ANSWER
-G1: 4 chromatids
-G2: 8 chromatids
What are characteristics of eukaryotic chromosomes? - ANSWER -DNA carries the genes
-The molecule is linear
-Most of the time it is present in the cell in its uncoiled form associated with
proteins and RNA (chromatin)
-Its fragile and diffuse, which is a problem for cell division
--The solution for this is to package by multiple condensation
How many centrioles do centrosomes in animal cells have? - ANSWER 2
Microtubules - ANSWER -form around the centrosomes
-build the spindle
apparatus
-some attach to the kinetochores which are on the
centromeres of chromosomes during cell division.
-They help pull
the chromosomes apart during anaphase
Chromatin - ANSWER -the DNA that makes up a chromosome
-Chromosomes are the pieces of DNA made up of chromatin
Chromatids - ANSWER the identical pieces of DNA held together by
centromeres
Meiosis - ANSWER -has two parts! In the end you get four haploid cells that are unique
- Required for the process of each parent contributing one set of homologs to offspring
What are most animals and plants (Haploid, Diploid, etc)? - ANSWER -Diploid, they have 2
homologous copies of each chromosome
-One copy is inherited from the mother, the other from the father
When is the DNA copied? - ANSWER In phase S
