Assignment 4 BIO 151 Summer 2016 Upload by Sunday, June 12th at 11:00 PM CHAPTER 12: THE CELL CYCLE 1.Define genome: 2. What is the difference between DNA in the chromatin form and the chromosome form? What form is DNA in during most of the cell cycle? 3. What is the difference between the centromere and the kinetochore? 4. What happens during each of these phases of the cell cycle? G1: S: G2: M: 5. The mitotic spindle is mainly made of what type of protein fiber? 6. How does cytokinesis differ between plant and animal cells? 7. Is binary fission truly mitosis? What type of organisms use binary fission for reproduction? Is this process sexual or asexual? 8. Draw/depict the phases of mitosis from prophase to the end of cytokinesis for an animal cell containing a total of six chromosomes. 9. What is the cell cycle control system and why is it important? 10. What happens to most mammal cells when they reach the G1 checkpoint? 11. Explain how MPF helps to regulate the cell cycle. (See Fig 12.16) 12. What is a growth factor? Provide an example from the chapter. 13. What does cancer have to do with the cell cycle? 14. Explain why each of the following would undergo mitosis: An early embryo: An amoeba: Skin cells: A broken bone: 15. How is prokaryotic DNA different from eukaryotic DNA? 16. Are the daughter cells produced by mitosis clones of the parent cell? 17. When mitosis is used for reproduction, is it sexual or asexual? What type(s) of organisms use mitosis for reproduction? CHAPTER 13: MEIOSIS & SEXUAL LIFE CYCLES 1.Define: Gene Allele Locus Gametes Somatic cells 2. What is the difference between sexual and asexual reproduction (in terms of number of parents, and variation in offspring)? 3. What is the difference between homologous chromosomes and sister chromatids? (Where do they “come from”? Are they identical?) 4. What are autosomes? How many pairs of autosomes do humans have? 5. Meiosis produces gametes. What are gametes used for? What is the union of gametes called? The union of gametes creates what? 6. What is the difference between cells that are haploid and cells that are diploid? Are gametes haploid or diploid? Are somatic cells haploid or diploid? 7. Do the following eukaryotes primarily reproduce sexually or asexually? Animals: Plants: Fungi: 8. How many daughter cells does meiosis produce? Are they diploid or haploid? Are they clones of the parent cell? 9. Draw/depict Meiosis Prophase I and Metaphase I for three pairs of chromosomes: 10. What happens during synapsis? Does synapsis happen during mitosis? 11. What are three things that happen during meiosis but not mitosis? (See P.260) 12. What is independent assortment of chromosomes? During which phase of meiosis does this occur? 13. If a cell undergoing meiosis has a haploid number of ...

1. Assignment 4 BIO 151 Summer
2016
Upload by Sunday, June 12th at 11:00 PM
CHAPTER 12: THE CELL CYCLE
1.Define genome:
2. What is the difference between DNA in the chromatin form
and the chromosome form? What form is DNA in during most
of the cell cycle?
3. What is the difference between the centromere and the
kinetochore?
4. What happens during each of these phases of the cell cycle?
G1:
S:
G2:
M:

2. 5. The mitotic spindle is mainly made of what type of protein
fiber?
6. How does cytokinesis differ between plant and animal cells?
7. Is binary fission truly mitosis? What type of organisms use
binary fission for reproduction? Is this process sexual or
asexual?
8. Draw/depict the phases of mitosis from prophase to the end
of cytokinesis for an animal cell containing a total of six
chromosomes.
9. What is the cell cycle control system and why is it important?

3. 10. What happens to most mammal cells when they reach the G1
checkpoint?
11. Explain how MPF helps to regulate the cell cycle. (See Fig
12.16)
12. What is a growth factor? Provide an example from the
chapter.
13. What does cancer have to do with the cell cycle?
14. Explain why each of the following would undergo mitosis:
An early embryo:

4. An amoeba:
Skin cells:
A broken bone:
15. How is prokaryotic DNA different from eukaryotic DNA?
16. Are the daughter cells produced by mitosis clones of the
parent cell?
17. When mitosis is used for reproduction, is it sexual or
asexual? What type(s) of organisms use mitosis for
reproduction?
CHAPTER 13: MEIOSIS & SEXUAL LIFE CYCLES
1.Define:
Gene
Allele
Locus
Gametes

5. Somatic cells
2. What is the difference between sexual and asexual
reproduction (in terms of number of parents, and variation in
offspring)?
3. What is the difference between homologous chromosomes
and sister chromatids? (Where do they “come from”? Are they
identical?)
4. What are autosomes? How many pairs of autosomes do
humans have?
5. Meiosis produces gametes.
What are gametes used for?
What is the union of gametes called?
The union of gametes creates what?

6. 6. What is the difference between cells that are haploid and
cells that are diploid?
Are gametes haploid or diploid?
Are somatic cells haploid or diploid?
7. Do the following eukaryotes primarily reproduce sexually or
asexually?
Animals:
Plants:
Fungi:
8. How many daughter cells does meiosis produce?
Are they diploid or haploid?
Are they clones of the parent cell?
9. Draw/depict Meiosis Prophase I and Metaphase I for three
pairs of chromosomes:

7. 10. What happens during synapsis? Does synapsis happen
during mitosis?
11. What are three things that happen during meiosis but not
mitosis? (See P.260)
12. What is independent assortment of chromosomes? During
which phase of meiosis does this occur?
13. If a cell undergoing meiosis has a haploid number of 6, what
is the number of different combinations of chromosomes that
can occur in the daughter cells?
14. Explain what crossing over is and how it increases genetic
variation in sexually reproducing organisms.

8. 15. How is genetic variation introduced into asexually
reproducing organisms like bacteria?
16. Why do most eukaryotes reproduce sexually? (What is the
advantage?)
CHAPTER 14: MENDEL & THE GENE IDEA
1. What is the difference between a character and a trait?
2. What is the difference between an individual’s genotype and
phenotype?
3. What do we know about the genotype of true-breeding plants
in Mendel’s experiments?

9. 4. In Mendel’s experiments, what is the genotype of the
individuals in a monohybrid cross (F1 x F1)? What is their
phenotype?
5. Are dominant alleles always more common than recessive
alleles in a population?
6. What is the law of segregation? This occurs during which
phase of meiosis?
7. In complete dominance, do homozygous dominant individuals
have the same phenotype as heterozygous individuals? Do they
have the same genotype?
8. Mrs. Smith has a widow’s peak (her genotype is Ww), but her
husband does not (his genotype is ww).
What are the possible gametes for Mrs. Smith
___________ Mr. Smith _____________
Make a Punnett Square for potential offspring produced by
this couple:

10. What is the probability that their child will have a widow’s
peak?
What is the probability that they will have two children both
with widow’s peaks?
9. Mendel’s dihybrid cross (F1 x F1) looked at the inheritance
of two characters. What were the genotypes of the F1 plants?
Did he find that seed color and seed texture were inherited
together or independently? Explain.
10. Besides having a widow’s peak (Ww), Mrs. Smith also has
attached earlobes (ff). Mr. Smith does not have a widow’s peak
(ww) or attached earlobes (Ff).
Considering both of these characters together, what are the
possible gametes
for Mrs. Smith _________________________ and Mr. Smith
__________________________?
Make a Punnett Square for both of these characters together.

11. What is the probability that their child will have a widow’s peak
and attached earlobes?
What is the probability that their child will have no widow’s
peak NOR attached earlobes?
11. An individual has a genotype WwFf. What are the possible
gametes that this person can make in respect to these two
genes?
12. In incomplete dominance, do homozygous dominant
individuals have the same phenotype as heterozygous
individuals?
13. How is codominance different from incomplete dominance?
14. Do most genes only have two alleles?

12. 15. Explain:
Pleiotropy
Epistasis
Polygenic inheritance
16. Give an example of how environment can affect an
organism’s phenotype?
17. In a recessively-inherited disorder, what are the genotypes
of:
A normal person
A carrier
An afflicted person
18. Why are dominantly-inherited disorders less common than
recessively-inherited disorders?

13. 19. Duncan and Maria are both carriers of cystic fibrosis, a
recessively-inherited disorder. Draw a Punnett square to show
their possible offspring.
What is the probability that their child will have cystic
fibrosis?
CHAPTER 15: CHROMOSOMAL BASIS OF INHERITANCE
1.According to Morgan’s terminology, what is the difference
between wild type and mutant phenotype?
2. Look at Figure 15.4. How did Morgan figure out that the
gene for eye color is on the X chromosome? Explain the F1
cross and what was produced in F2.
3. What are sex-linked genes?

14. 4. In mammals (and fruit flies) are males or females the
heterogametic sex? Is this the case for all species?
5. Draw a Punnett square to show how sex is determined in
humans (XX x XY). This also explains why we have about a
50:50 sex ratio.
6. Which chromosome carries more genes, X or Y?
Are there genes on the Y chromosome that are important for all
humans? What type of genes are found on the Y chromosome?
7. Why are men more likely than women to get a sex-linked
disorder?

15. 8. Can a man pass on a sex-linked disorder to his sons?
Explain.
9. Define:
Non-disjunction
When can non-disjunction occur?
Aneuploidy
10. When aneuploidy occurs, what usually happens to the
embryo?
11. Explain what happens to the DNA when the following
occur:
Deletion
Duplication
Inversion

16. Translocation
12. What causes Down syndrome?
Assignment 4