BIO 121 FINAL EXAM 2026
COMPREHENSIVE PRACTICE QUESTIONS
AND VERIFIED CORRECT ANSWERS WITH
DETAILED EXPLANATIONS COMPLETE
BIOLOGY 121 FINAL EXAM REVIEW AND
STUDY GUIDE FOR COLLEGE SUCCES
Histones - CORRECT ANSWER -Maintain chromosome structure
Interphase - CORRECT ANSWER -Duplication of cell contents
G1 Phase(first gap) - CORRECT ANSWER -growth, increase in cytoplasm
S Phase (DNA synthesis) - CORRECT ANSWER -duplication of chromosomes
G2 Phase (second gap) - CORRECT ANSWER -growth, prep for cell divison
Mitotic spindle - CORRECT ANSWER -required to guide separation of 2 sets
of daughter chromosomes
Prophase - CORRECT ANSWER -chromosomes become more tightly coiled
and folded but start to separate
,Prometaphase - CORRECT ANSWER -Nuclear envelope breaks down and
disappears
Metaphase - CORRECT ANSWER -Chromosomes align at the center of the
cell
Anaphase - CORRECT ANSWER -sister chromatids start to separate
Telophase - CORRECT ANSWER -cell elongates (almost in 2)
cytokensis begins (pinching)
Prokaryotic - CORRECT ANSWER -no nucleus
divides by binary fission
Meiosis - CORRECT ANSWER -One chromosome
Somatic cells - CORRECT ANSWER -all cells in body but not sex cells
Gamete cells - CORRECT ANSWER -sex cells
Prophase I - CORRECT ANSWER -The chromosomes condense, and the
nuclear envelope breaks down. crossing-over occurs.
, Synapsis - CORRECT ANSWER -chromosomes line up with the homologous
pair
Crossing over - CORRECT ANSWER -Strands of tetrad can twist and
exchange segments
Metaphase I - CORRECT ANSWER -Homologous pairs line up in the middle
on the metaphase plate.
Anaphase I - CORRECT ANSWER -(disjunction) homologous pairs separate
Telophase I - CORRECT ANSWER -(cytokinesis occurs) chromosomes gather
into the nuclei, original cells divide
Which of the following statements is false?
A. Meiosis only occurs in ovaries and testes
B. All sexual life cycles involve alternate diploid and haploid cells
C. Mitosis produces daughter cells with 1/2 chromosomes parent cells
D. Normal human zygote has 46 chromosomes - CORRECT ANSWER -D.
Mitosis produces daughter cells with 1/2 chromosomes of parent cells
Which is false about mitosis?
A. Mitosis allows organisms to grow
B. Mitosis allows organisms to generate genetic diversity
C. Mitosis allows organisms to reproduce asexually
COMPREHENSIVE PRACTICE QUESTIONS
AND VERIFIED CORRECT ANSWERS WITH
DETAILED EXPLANATIONS COMPLETE
BIOLOGY 121 FINAL EXAM REVIEW AND
STUDY GUIDE FOR COLLEGE SUCCES
Histones - CORRECT ANSWER -Maintain chromosome structure
Interphase - CORRECT ANSWER -Duplication of cell contents
G1 Phase(first gap) - CORRECT ANSWER -growth, increase in cytoplasm
S Phase (DNA synthesis) - CORRECT ANSWER -duplication of chromosomes
G2 Phase (second gap) - CORRECT ANSWER -growth, prep for cell divison
Mitotic spindle - CORRECT ANSWER -required to guide separation of 2 sets
of daughter chromosomes
Prophase - CORRECT ANSWER -chromosomes become more tightly coiled
and folded but start to separate
,Prometaphase - CORRECT ANSWER -Nuclear envelope breaks down and
disappears
Metaphase - CORRECT ANSWER -Chromosomes align at the center of the
cell
Anaphase - CORRECT ANSWER -sister chromatids start to separate
Telophase - CORRECT ANSWER -cell elongates (almost in 2)
cytokensis begins (pinching)
Prokaryotic - CORRECT ANSWER -no nucleus
divides by binary fission
Meiosis - CORRECT ANSWER -One chromosome
Somatic cells - CORRECT ANSWER -all cells in body but not sex cells
Gamete cells - CORRECT ANSWER -sex cells
Prophase I - CORRECT ANSWER -The chromosomes condense, and the
nuclear envelope breaks down. crossing-over occurs.
, Synapsis - CORRECT ANSWER -chromosomes line up with the homologous
pair
Crossing over - CORRECT ANSWER -Strands of tetrad can twist and
exchange segments
Metaphase I - CORRECT ANSWER -Homologous pairs line up in the middle
on the metaphase plate.
Anaphase I - CORRECT ANSWER -(disjunction) homologous pairs separate
Telophase I - CORRECT ANSWER -(cytokinesis occurs) chromosomes gather
into the nuclei, original cells divide
Which of the following statements is false?
A. Meiosis only occurs in ovaries and testes
B. All sexual life cycles involve alternate diploid and haploid cells
C. Mitosis produces daughter cells with 1/2 chromosomes parent cells
D. Normal human zygote has 46 chromosomes - CORRECT ANSWER -D.
Mitosis produces daughter cells with 1/2 chromosomes of parent cells
Which is false about mitosis?
A. Mitosis allows organisms to grow
B. Mitosis allows organisms to generate genetic diversity
C. Mitosis allows organisms to reproduce asexually
