Portage Learning
3 MAXE · 101 DOIB
DNA
P Geneva College · Online Education
AFFORDABLE, ACCREDITED, ACCESSIBLE · SINCE 2014
EST. 2014
BIOD 101 · Exam 3
G E N E T I CS , C E L L S I G N A L I N G , I M M U N O LO G Y & M I C R O B I O LO G Y
INSTITUTION Portage Learning / Geneva College COURSE CODE BIOD 101
PROGRAM Pre-Nursing / Health Sciences ACADEMIC YEAR
EXAM TITLE Exam 3 — Genetics, Signaling & Immunity TOTAL QUESTIONS 100+ Questions
COURSE TITLE Biology 101 — Foundations of Life FORMAT Multiple Choice / True/False / Matching
EXAMINATION INSTRUCTIONS
▸ Select the single best answer for each question unless otherwise instructed.
▸ Content covers meiosis, Mendelian genetics, cell signaling, immunity, and microbiology.
MEIOSIS, GENETICS, SIGNALING, IMMUNITY & MICROBIOLOGY Questions 1 – 100+
1. Describe crossing over.
A. Separation of sister chromatids during anaphase.
B. Exchange of genetic information between homologous chromosomes during Prophase I.
C. Independent alignment of chromosomes at the metaphase plate.
D. Fusion of gametes to form a zygote.
CORRECT ANSWER B — Exchange of genetic information between homologous chromosomes during Prophase I.
RATIONALE Crossing over occurs during Prophase I of meiosis when non-sister chromatids of homologous chromosomes
exchange corresponding DNA segments, creating genetic variation.
2. What is a recombinant chromosome?
A. A chromosome identical to the parent.
B. A chromosome carrying genetic information from both parents but not identical to either.
C. A chromosome found only in prokaryotes.
D. A chromosome lacking a centromere.
CORRECT ANSWER B — A chromosome carrying genetic information from both parents but not identical to either.
RATIONALE Recombinant chromosomes result from crossing over, containing new combinations of alleles not present in
either parent.
, 3. What is cohesin and what does it do?
A. An enzyme that degrades spindle fibers.
B. A protein that holds sister chromatids together.
C. A lipid that forms the nuclear membrane.
D. A carbohydrate in the cell wall.
CORRECT ANSWER B — A protein that holds sister chromatids together.
RATIONALE Cohesin proteins form a ring-like structure that holds sister chromatids together from S phase until anaphase,
when they are cleaved to allow separation.
4. How is Meiosis II characterized?
A. Separation of homologous chromosomes.
B. Separation of sister chromatids to produce 4 haploid daughter cells.
C. DNA replication and crossing over.
D. Fusion of gametes.
CORRECT ANSWER B — Separation of sister chromatids to produce 4 haploid daughter cells.
RATIONALE Meiosis II resembles mitosis in separating sister chromatids, producing four unique haploid cells from the
original diploid cell.
5. At the end of meiosis II, how many daughter cells are produced?
A. 2 diploid daughter cells.
B. 4 haploid daughter cells.
C. 2 haploid daughter cells.
D. 4 diploid daughter cells.
CORRECT ANSWER B — 4 haploid daughter cells.
RATIONALE Meiosis produces four genetically distinct haploid cells, each with half the original chromosome number.
6. Describe independent assortment.
A. Homologous chromosomes line up randomly at the metaphase plate during Meiosis I.
B. Sister chromatids separate during anaphase.
C. Alleles of one gene always segregate together.
D. All gametes receive identical chromosomes.
CORRECT ANSWER A — Homologous chromosomes line up randomly at the metaphase plate during Meiosis I.
RATIONALE Independent assortment during Metaphase I shuffles maternal and paternal chromosomes randomly,
generating 2ⁿ possible gamete combinations.
3 MAXE · 101 DOIB
DNA
P Geneva College · Online Education
AFFORDABLE, ACCREDITED, ACCESSIBLE · SINCE 2014
EST. 2014
BIOD 101 · Exam 3
G E N E T I CS , C E L L S I G N A L I N G , I M M U N O LO G Y & M I C R O B I O LO G Y
INSTITUTION Portage Learning / Geneva College COURSE CODE BIOD 101
PROGRAM Pre-Nursing / Health Sciences ACADEMIC YEAR
EXAM TITLE Exam 3 — Genetics, Signaling & Immunity TOTAL QUESTIONS 100+ Questions
COURSE TITLE Biology 101 — Foundations of Life FORMAT Multiple Choice / True/False / Matching
EXAMINATION INSTRUCTIONS
▸ Select the single best answer for each question unless otherwise instructed.
▸ Content covers meiosis, Mendelian genetics, cell signaling, immunity, and microbiology.
MEIOSIS, GENETICS, SIGNALING, IMMUNITY & MICROBIOLOGY Questions 1 – 100+
1. Describe crossing over.
A. Separation of sister chromatids during anaphase.
B. Exchange of genetic information between homologous chromosomes during Prophase I.
C. Independent alignment of chromosomes at the metaphase plate.
D. Fusion of gametes to form a zygote.
CORRECT ANSWER B — Exchange of genetic information between homologous chromosomes during Prophase I.
RATIONALE Crossing over occurs during Prophase I of meiosis when non-sister chromatids of homologous chromosomes
exchange corresponding DNA segments, creating genetic variation.
2. What is a recombinant chromosome?
A. A chromosome identical to the parent.
B. A chromosome carrying genetic information from both parents but not identical to either.
C. A chromosome found only in prokaryotes.
D. A chromosome lacking a centromere.
CORRECT ANSWER B — A chromosome carrying genetic information from both parents but not identical to either.
RATIONALE Recombinant chromosomes result from crossing over, containing new combinations of alleles not present in
either parent.
, 3. What is cohesin and what does it do?
A. An enzyme that degrades spindle fibers.
B. A protein that holds sister chromatids together.
C. A lipid that forms the nuclear membrane.
D. A carbohydrate in the cell wall.
CORRECT ANSWER B — A protein that holds sister chromatids together.
RATIONALE Cohesin proteins form a ring-like structure that holds sister chromatids together from S phase until anaphase,
when they are cleaved to allow separation.
4. How is Meiosis II characterized?
A. Separation of homologous chromosomes.
B. Separation of sister chromatids to produce 4 haploid daughter cells.
C. DNA replication and crossing over.
D. Fusion of gametes.
CORRECT ANSWER B — Separation of sister chromatids to produce 4 haploid daughter cells.
RATIONALE Meiosis II resembles mitosis in separating sister chromatids, producing four unique haploid cells from the
original diploid cell.
5. At the end of meiosis II, how many daughter cells are produced?
A. 2 diploid daughter cells.
B. 4 haploid daughter cells.
C. 2 haploid daughter cells.
D. 4 diploid daughter cells.
CORRECT ANSWER B — 4 haploid daughter cells.
RATIONALE Meiosis produces four genetically distinct haploid cells, each with half the original chromosome number.
6. Describe independent assortment.
A. Homologous chromosomes line up randomly at the metaphase plate during Meiosis I.
B. Sister chromatids separate during anaphase.
C. Alleles of one gene always segregate together.
D. All gametes receive identical chromosomes.
CORRECT ANSWER A — Homologous chromosomes line up randomly at the metaphase plate during Meiosis I.
RATIONALE Independent assortment during Metaphase I shuffles maternal and paternal chromosomes randomly,
generating 2ⁿ possible gamete combinations.
