BIOD 210 Module 6 Exam – Portage Learning
(2026) – Practice Questions with Answers &
Rationales
Based on the available search results, I have compiled a
comprehensive set of practice questions for the BIOD 210
Genetics Module 6 Exam at Portage Learning. These questions are
derived from unofficial student-shared resources and designed to
help you prepare effectively for the 2026 testing cycle .
MODULE 6: CHROMOSOMAL ABERRATIONS &
STRUCTURAL VARIATIONS
Question 6.1 (True/False)
A chromosomal aberration is an alteration to the chromosome
that results in a change to the total number of chromosomes,
deletions or additions to the chromosome, or even complete
rearrangement of chromosomal segments.
A) True
B) False
Correct Answer: A
Rationale: "Chromosomal aberration" is a broad term that includes
numerical changes (aneuploidy, polyploidy) and structural changes
(deletions, insertions, duplications, translocations). All of these alter
,chromosome number or structure compared with the normal
karyotype, so the statement is correct .
Question 6.2 (True/False)
Sex chromosomes occur in pairs.
A) True
B) False
Correct Answer: B
Rationale: In humans, many individuals do have paired sex
chromosomes (XX or XY), but this is not universally true across
species or even across all viable human karyotypes (e.g., XO, XXX,
XXY). Because the statement is absolute ("occur in pairs"), it is
considered false when viewed in a broader genetic context .
Question 6.3 (True/False)
Trisomy and monosomy in autosomal chromosomes is generally
tolerated better in animals than in plants.
A) True
B) False
Correct Answer: B
Rationale: In general, plants tolerate changes in chromosome
number (aneuploidy and polyploidy) much better than animals.
, Plants can survive with additional or missing chromosomes more
readily than animals, where most autosomal aneuploidies are lethal
or cause severe syndromes .
Question 6.4 (True/False)
A chromosomal aberration can include changes to chromosome
number, structure, or both.
A) True
B) False
Correct Answer: A
Rationale: The term "chromosomal aberration" encompasses any
alteration from the normal chromosome complement, including
changes to chromosome number (e.g., trisomy, monosomy),
structural changes (e.g., deletions, duplications, translocations,
inversions), or both .
Question 6.5 (Fill in the Blank)
The ______ is the region of chromosome 21 thought to be typically
responsible for the phenotype of Down syndrome.
A) DSCR
B) DSTT
C) T21DS
D) DSRR
(2026) – Practice Questions with Answers &
Rationales
Based on the available search results, I have compiled a
comprehensive set of practice questions for the BIOD 210
Genetics Module 6 Exam at Portage Learning. These questions are
derived from unofficial student-shared resources and designed to
help you prepare effectively for the 2026 testing cycle .
MODULE 6: CHROMOSOMAL ABERRATIONS &
STRUCTURAL VARIATIONS
Question 6.1 (True/False)
A chromosomal aberration is an alteration to the chromosome
that results in a change to the total number of chromosomes,
deletions or additions to the chromosome, or even complete
rearrangement of chromosomal segments.
A) True
B) False
Correct Answer: A
Rationale: "Chromosomal aberration" is a broad term that includes
numerical changes (aneuploidy, polyploidy) and structural changes
(deletions, insertions, duplications, translocations). All of these alter
,chromosome number or structure compared with the normal
karyotype, so the statement is correct .
Question 6.2 (True/False)
Sex chromosomes occur in pairs.
A) True
B) False
Correct Answer: B
Rationale: In humans, many individuals do have paired sex
chromosomes (XX or XY), but this is not universally true across
species or even across all viable human karyotypes (e.g., XO, XXX,
XXY). Because the statement is absolute ("occur in pairs"), it is
considered false when viewed in a broader genetic context .
Question 6.3 (True/False)
Trisomy and monosomy in autosomal chromosomes is generally
tolerated better in animals than in plants.
A) True
B) False
Correct Answer: B
Rationale: In general, plants tolerate changes in chromosome
number (aneuploidy and polyploidy) much better than animals.
, Plants can survive with additional or missing chromosomes more
readily than animals, where most autosomal aneuploidies are lethal
or cause severe syndromes .
Question 6.4 (True/False)
A chromosomal aberration can include changes to chromosome
number, structure, or both.
A) True
B) False
Correct Answer: A
Rationale: The term "chromosomal aberration" encompasses any
alteration from the normal chromosome complement, including
changes to chromosome number (e.g., trisomy, monosomy),
structural changes (e.g., deletions, duplications, translocations,
inversions), or both .
Question 6.5 (Fill in the Blank)
The ______ is the region of chromosome 21 thought to be typically
responsible for the phenotype of Down syndrome.
A) DSCR
B) DSTT
C) T21DS
D) DSRR
