BIOD210
Intro to Genetics & Modern Implications
Comprehensive Test Review (Qns & Ans)
2025
1. Which of the following best describes the concept of genetic
linkage?
- A) Genes that are located on different chromosomes
- B) Genes that are located close to each other on the same
chromosome
- C) Genes that have identical sequences
- D) Genes that undergo independent assortment
- ANS: B) Genes that are located close to each other on the
same chromosome
©/2025
, - Rationale: Genetic linkage refers to genes that are located
close to each other on the same chromosome and tend to be
inherited together.
2. What is the primary purpose of a Punnett square in genetics?
- A) To determine the sequence of DNA
- B) To predict the probability of offspring genotypes
- C) To measure gene expression levels
- D) To identify genetic mutations
- ANS: B) To predict the probability of offspring genotypes
- Rationale: A Punnett square is used to predict the
probability of offspring inheriting specific genotypes based on the
genotypes of the parents.
3. Which of the following genetic techniques is used to amplify
specific DNA sequences?
- A) Gel electrophoresis
- B) Polymerase chain reaction (PCR)
- C) Restriction enzyme digestion
- D) Southern blotting
- ANS: B) Polymerase chain reaction (PCR)
©/2025
, - Rationale: PCR is a technique used to amplify specific
DNA sequences, allowing for the analysis and manipulation of
small amounts of DNA.
Fill-in-the-Blank Questions
4. The __________ project aimed to sequence the entire human
genome and identify all human genes.
- ANS: Human Genome
- Rationale: The Human Genome Project aimed to sequence
the entire human genome and identify all human genes, providing
a comprehensive map of human genetic information.
5. In genetics, __________ refers to the process by which a
single gene influences multiple phenotypic traits.
- ANS: Pleiotropy
- Rationale: Pleiotropy occurs when a single gene influences
multiple phenotypic traits, often due to the gene's involvement in
multiple biological pathways.
6. The __________ is a region of a chromosome that is critical
for the proper segregation of chromosomes during cell division.
- ANS: Centromere
- Rationale: The centromere is a region of a chromosome that
is critical for the proper segregation of chromosomes during cell
©/2025
, division, ensuring accurate distribution of genetic material to
daughter cells.
True/False Questions
7. True or False: Mitochondrial DNA is inherited exclusively
from the mother.
- ANS: True
- Rationale: Mitochondrial DNA is inherited exclusively
from the mother because mitochondria are passed on to offspring
through the egg cell, not the sperm.
8. True or False: All mutations in DNA result in harmful effects
on the organism.
- ANS: False
- Rationale: Not all mutations result in harmful effects; some
mutations can be neutral or even beneficial, contributing to
genetic diversity and adaptation.
9. True or False: Gene therapy involves the introduction of
normal genes into cells to correct genetic disorders.
- ANS: True
- Rationale: Gene therapy involves the introduction of normal
genes into cells to correct or replace defective genes responsible
for genetic disorders.
©/2025
Intro to Genetics & Modern Implications
Comprehensive Test Review (Qns & Ans)
2025
1. Which of the following best describes the concept of genetic
linkage?
- A) Genes that are located on different chromosomes
- B) Genes that are located close to each other on the same
chromosome
- C) Genes that have identical sequences
- D) Genes that undergo independent assortment
- ANS: B) Genes that are located close to each other on the
same chromosome
©/2025
, - Rationale: Genetic linkage refers to genes that are located
close to each other on the same chromosome and tend to be
inherited together.
2. What is the primary purpose of a Punnett square in genetics?
- A) To determine the sequence of DNA
- B) To predict the probability of offspring genotypes
- C) To measure gene expression levels
- D) To identify genetic mutations
- ANS: B) To predict the probability of offspring genotypes
- Rationale: A Punnett square is used to predict the
probability of offspring inheriting specific genotypes based on the
genotypes of the parents.
3. Which of the following genetic techniques is used to amplify
specific DNA sequences?
- A) Gel electrophoresis
- B) Polymerase chain reaction (PCR)
- C) Restriction enzyme digestion
- D) Southern blotting
- ANS: B) Polymerase chain reaction (PCR)
©/2025
, - Rationale: PCR is a technique used to amplify specific
DNA sequences, allowing for the analysis and manipulation of
small amounts of DNA.
Fill-in-the-Blank Questions
4. The __________ project aimed to sequence the entire human
genome and identify all human genes.
- ANS: Human Genome
- Rationale: The Human Genome Project aimed to sequence
the entire human genome and identify all human genes, providing
a comprehensive map of human genetic information.
5. In genetics, __________ refers to the process by which a
single gene influences multiple phenotypic traits.
- ANS: Pleiotropy
- Rationale: Pleiotropy occurs when a single gene influences
multiple phenotypic traits, often due to the gene's involvement in
multiple biological pathways.
6. The __________ is a region of a chromosome that is critical
for the proper segregation of chromosomes during cell division.
- ANS: Centromere
- Rationale: The centromere is a region of a chromosome that
is critical for the proper segregation of chromosomes during cell
©/2025
, division, ensuring accurate distribution of genetic material to
daughter cells.
True/False Questions
7. True or False: Mitochondrial DNA is inherited exclusively
from the mother.
- ANS: True
- Rationale: Mitochondrial DNA is inherited exclusively
from the mother because mitochondria are passed on to offspring
through the egg cell, not the sperm.
8. True or False: All mutations in DNA result in harmful effects
on the organism.
- ANS: False
- Rationale: Not all mutations result in harmful effects; some
mutations can be neutral or even beneficial, contributing to
genetic diversity and adaptation.
9. True or False: Gene therapy involves the introduction of
normal genes into cells to correct genetic disorders.
- ANS: True
- Rationale: Gene therapy involves the introduction of normal
genes into cells to correct or replace defective genes responsible
for genetic disorders.
©/2025
