IB 150- Unit 2 Exam- Week 6 Questions With Complete
Solutions
3 Reasons for Sexual Reproduction Correct Answers 1.
Environmental variability- diseases, food, weather
2. Mutations- two copies of each gene (one from each parent) so
even if one allele carries a mutation, you still have another one
that produces a normally functioning allele
3. Matching of copies between 2 homologs, DNA repair of some
forms of DNA damage
Anaphase Correct Answers chromosomes move to opposite
poles of the spindle apparatus
Anaphase I Effectc Correct Answers Responsible for reducing
ploidy by half
Anaphase II Effect Correct Answers change from replicated to
non-replicated chromosomes
Asexual vs Sexual Reproduction: Advantages Correct Answers
Asexual: time efficient, no need to search for a mate, requires
less energy
Sexual: variation, unique organism is more protected
Asexual vs Sexual Reproduction: Cell Division Correct Answers
Asexual: mitosis, fission, budding, regeneration
,Sexual: meiosis
Asexual vs Sexual Reproduction: Disadvantages Correct
Answers Asexual: no variation, if parent has genetic disease,
offspring does too
Sexual: requires two organisms, requires more energy
Asexual vs Sexual Reproduction: Evolution Correct Answers
Asexual: Little chance of variation, mutations in DNA can still
occur but not nearly as frequently as in sexual reproduction
Sexual: Leads to genetic variation in new generations of
offspring
Asexual vs Sexual Reproduction: Found in Correct Answers
Asexual: Lower organisms
Sexual: Higher invertebrates and all vertebrates
Asexual vs Sexual Reproduction: Involvement of sex cells
Correct Answers Asexual: No formation or fusion of gametes
(sex cells)
Sexual: Formation and fusion of gametes (sex cells) occurs
Asexual vs Sexual Reproduction: Number of Offspring Correct
Answers Asexual: Two or more
Sexual: one or more
, Asexual vs Sexual Reproduction: Number of Organisms
Involved Correct Answers Asexual: 1
Sexual: 2 parents for mating
Asexual vs Sexual Reproduction: Time Taken Correct Answers
Asexual: Short period of time
Sexual: Several months
Asexual vs Sexual Reproduction: Types Correct Answers
Asexual: budding, vegetative reproduction, fragmentation, spore
production
Sexual: syngamy, conjugation
Asexual vs Sexual Reproduction: Unit of Reproduction Correct
Answers Asexual: May be whole parent body or a fragment or a
single somatic cell
Sexual: Gamete
Autosomal chromosomes Correct Answers patterns of
inheritance of any genes not on a sex chromosome
Bacterial sex Correct Answers donor bacteria is able to share a
strand of its plasmid to the recipient bacteria. As this strand
crosses over to the recipient bacteria, both bacteria now have
two strands complementary to each other. There are two
complete plasmids in the two different bacteria cells.
Solutions
3 Reasons for Sexual Reproduction Correct Answers 1.
Environmental variability- diseases, food, weather
2. Mutations- two copies of each gene (one from each parent) so
even if one allele carries a mutation, you still have another one
that produces a normally functioning allele
3. Matching of copies between 2 homologs, DNA repair of some
forms of DNA damage
Anaphase Correct Answers chromosomes move to opposite
poles of the spindle apparatus
Anaphase I Effectc Correct Answers Responsible for reducing
ploidy by half
Anaphase II Effect Correct Answers change from replicated to
non-replicated chromosomes
Asexual vs Sexual Reproduction: Advantages Correct Answers
Asexual: time efficient, no need to search for a mate, requires
less energy
Sexual: variation, unique organism is more protected
Asexual vs Sexual Reproduction: Cell Division Correct Answers
Asexual: mitosis, fission, budding, regeneration
,Sexual: meiosis
Asexual vs Sexual Reproduction: Disadvantages Correct
Answers Asexual: no variation, if parent has genetic disease,
offspring does too
Sexual: requires two organisms, requires more energy
Asexual vs Sexual Reproduction: Evolution Correct Answers
Asexual: Little chance of variation, mutations in DNA can still
occur but not nearly as frequently as in sexual reproduction
Sexual: Leads to genetic variation in new generations of
offspring
Asexual vs Sexual Reproduction: Found in Correct Answers
Asexual: Lower organisms
Sexual: Higher invertebrates and all vertebrates
Asexual vs Sexual Reproduction: Involvement of sex cells
Correct Answers Asexual: No formation or fusion of gametes
(sex cells)
Sexual: Formation and fusion of gametes (sex cells) occurs
Asexual vs Sexual Reproduction: Number of Offspring Correct
Answers Asexual: Two or more
Sexual: one or more
, Asexual vs Sexual Reproduction: Number of Organisms
Involved Correct Answers Asexual: 1
Sexual: 2 parents for mating
Asexual vs Sexual Reproduction: Time Taken Correct Answers
Asexual: Short period of time
Sexual: Several months
Asexual vs Sexual Reproduction: Types Correct Answers
Asexual: budding, vegetative reproduction, fragmentation, spore
production
Sexual: syngamy, conjugation
Asexual vs Sexual Reproduction: Unit of Reproduction Correct
Answers Asexual: May be whole parent body or a fragment or a
single somatic cell
Sexual: Gamete
Autosomal chromosomes Correct Answers patterns of
inheritance of any genes not on a sex chromosome
Bacterial sex Correct Answers donor bacteria is able to share a
strand of its plasmid to the recipient bacteria. As this strand
crosses over to the recipient bacteria, both bacteria now have
two strands complementary to each other. There are two
complete plasmids in the two different bacteria cells.
