BIOD 210 Genetics Exam With Correct
Questions And Answers
Exam
**Question 1**
The study of heredity, first coined in the early 1900s, focuses
primarily on the understanding of genes and how they contribute to
the passing of traits. This is the definition of:
A) Genomics
B) Genetics
C) Cytogenetics
D) Epigenetics
**Answer: B) Genetics**
**Rationale:** Genetics is the branch of biology that studies heredity
and variation in organisms. Genomics focuses on the entire genome,
cytogenetics is the study of chromosomes and their structure, and
epigenetics deals with heritable changes not involving DNA sequence
changes.
---
**Question 2**
,What type of plants did Gregor Mendel use in his famous
experiments?
A) Corn plants
B) Pea plants
C) Tomato plants
D) Wheat plants
**Answer: B) Pea plants**
**Rationale:** Mendel chose garden peas (*Pisum sativum*) for
several key reasons: they have easily observable traits with two
distinct forms, short generation times, can self-pollinate or be cross-
pollinated, and were easy to grow and breed. These characteristics
allowed him to derive the basic laws of inheritance.
---
**Question 3**
How does preformation differ from epigenesis?
A) Preformation says development builds structures stepwise;
epigenesis says a tiny preformed human just grows
B) Preformation says a tiny fully formed human exists in the gamete
and only grows; epigenesis says structures arise gradually from an
initially simple embryo
C) Both theories state that environment alone shapes the embryo
D) They are the same concept with different names
,**Answer: B) Preformation says a tiny fully formed human exists in
the gamete and only grows; epigenesis says structures arise gradually
from an initially simple embryo**
**Rationale:** Historically, preformationists imagined a homunculus
(tiny fully formed human) inside the gamete that simply enlarged
during development. Epigenesis, the correct view, states that tissues
and organs form progressively through cell division and
differentiation from a simple embryo.
---
**Question 4**
Charles Darwin's publication on evolution is called:
A) Evolution in a Modern Age
B) The Origin of Species
C) The Theory of Relativity
D) Principles of Genetics
**Answer: B) The Origin of Species**
**Rationale:** Darwin's full title, *On the Origin of Species by Means
of Natural Selection*, outlined his evidence and arguments for
evolution by natural selection and transformed biological science.
, ---
**Question 5**
Matthias Schleiden and Theodor Schwann famously introduced:
A) The Origin of Species
B) The Cell Theory
C) Germ Theory of Disease
D) Chromosomal Theory of Inheritance
**Answer: B) The Cell Theory**
**Rationale:** Schleiden and Schwann concluded that all organisms
are composed of cells and that the cell is the basic unit of life. This
foundational cell theory underlies modern biology and medicine.
---
**Question 6**
The chromosomal theory of inheritance states that:
A) Chromosomes are contained within genes that encode for all
genetic traits
B) Chromosomes inherited from a father will be dominant over those
from the mother
C) The proteins within chromosomes are the main drivers of genetic
inheritance
Questions And Answers
Exam
**Question 1**
The study of heredity, first coined in the early 1900s, focuses
primarily on the understanding of genes and how they contribute to
the passing of traits. This is the definition of:
A) Genomics
B) Genetics
C) Cytogenetics
D) Epigenetics
**Answer: B) Genetics**
**Rationale:** Genetics is the branch of biology that studies heredity
and variation in organisms. Genomics focuses on the entire genome,
cytogenetics is the study of chromosomes and their structure, and
epigenetics deals with heritable changes not involving DNA sequence
changes.
---
**Question 2**
,What type of plants did Gregor Mendel use in his famous
experiments?
A) Corn plants
B) Pea plants
C) Tomato plants
D) Wheat plants
**Answer: B) Pea plants**
**Rationale:** Mendel chose garden peas (*Pisum sativum*) for
several key reasons: they have easily observable traits with two
distinct forms, short generation times, can self-pollinate or be cross-
pollinated, and were easy to grow and breed. These characteristics
allowed him to derive the basic laws of inheritance.
---
**Question 3**
How does preformation differ from epigenesis?
A) Preformation says development builds structures stepwise;
epigenesis says a tiny preformed human just grows
B) Preformation says a tiny fully formed human exists in the gamete
and only grows; epigenesis says structures arise gradually from an
initially simple embryo
C) Both theories state that environment alone shapes the embryo
D) They are the same concept with different names
,**Answer: B) Preformation says a tiny fully formed human exists in
the gamete and only grows; epigenesis says structures arise gradually
from an initially simple embryo**
**Rationale:** Historically, preformationists imagined a homunculus
(tiny fully formed human) inside the gamete that simply enlarged
during development. Epigenesis, the correct view, states that tissues
and organs form progressively through cell division and
differentiation from a simple embryo.
---
**Question 4**
Charles Darwin's publication on evolution is called:
A) Evolution in a Modern Age
B) The Origin of Species
C) The Theory of Relativity
D) Principles of Genetics
**Answer: B) The Origin of Species**
**Rationale:** Darwin's full title, *On the Origin of Species by Means
of Natural Selection*, outlined his evidence and arguments for
evolution by natural selection and transformed biological science.
, ---
**Question 5**
Matthias Schleiden and Theodor Schwann famously introduced:
A) The Origin of Species
B) The Cell Theory
C) Germ Theory of Disease
D) Chromosomal Theory of Inheritance
**Answer: B) The Cell Theory**
**Rationale:** Schleiden and Schwann concluded that all organisms
are composed of cells and that the cell is the basic unit of life. This
foundational cell theory underlies modern biology and medicine.
---
**Question 6**
The chromosomal theory of inheritance states that:
A) Chromosomes are contained within genes that encode for all
genetic traits
B) Chromosomes inherited from a father will be dominant over those
from the mother
C) The proteins within chromosomes are the main drivers of genetic
inheritance
