,BIOD 210 Module 2 Exam | Q&A | 2026/2027 | Genetics | Portage
Learning
1. Who is known as the father of modern genetics for his work with pea
plants?
A) Charles Darwin
B) Gregor Mendel
C) James Watson
D) Francis Crick
Correct Answer: Gregor Mendel
Rationale: Gregor Mendel is recognized as the father of genetics for
establishing the basic laws of inheritance through his experiments with pea
plants in the 1860s. His work laid the foundation for modern genetics.
2. Mendel's label of "unit factors" are what we now refer to as:
A) Chromosomes
B) Alleles
C) Phenotypes
D) Genotypes
Correct Answer: Alleles
Rationale: Mendel's "unit factors" are what we now refer to as alleles.
Mendel's first postulate states that each trait is controlled by "unit factors"
(alleles) that occur in pairs in individual organisms.
3. Which of the following statements about Mendel's unit factors is correct?
A) Mendel's label of "unit factors" are what we now refer to as chromosomes
,B) Genetic characteristics are controlled by unit factors that exist in pairs
C) Each gamete carries both unit factors for a trait
D) Unit factors are always identical to the phenotype
Correct Answer: Genetic characteristics are controlled by unit factors that
exist in pairs
Rationale: Mendel's first postulate states that each trait is controlled by "unit
factors" (alleles) that occur in pairs in individual organisms. These pairs
separate during gamete formation, but in the organism itself they exist as
paired determinants of phenotype.
4. What is Mendel's First Law?
A) Law of Independent Assortment
B) Law of Segregation
C) Law of Dominance
D) Law of Unit Factors
Correct Answer: Law of Segregation
Rationale: Mendel's First Law is the Law of Segregation. It states that during
gamete formation, the two alleles for a gene separate so that each gamete
receives only one allele.
5. What does the Law of Segregation state?
A) Alleles for different traits are inherited independently
B) Dominant alleles always mask recessive alleles
C) During gamete formation, the two alleles for a gene separate so that each
gamete receives only one allele
, D) Genes are located on specific positions on chromosomes
Correct Answer: During gamete formation, the two alleles for a gene
separate so that each gamete receives only one allele
Rationale: The Law of Segregation states that during gamete formation, the
two alleles for a gene separate so that each gamete receives only one allele.
This is Mendel's First Law.
6. What is Mendel's Second Law?
A) Law of Segregation
B) Law of Dominance
C) Law of Independent Assortment
D) Law of Unit Factors
Correct Answer: Law of Independent Assortment
Rationale: Mendel's Second Law is the Law of Independent Assortment. It
states that alleles of different genes assort independently of one another
during gamete formation.
7. What does the Law of Independent Assortment state?
A) During gamete formation, the two alleles for a gene separate
B) Alleles of different genes assort independently of one another during
gamete formation
C) Dominant alleles always mask recessive alleles
D) Genes are located on specific positions on chromosomes
Learning
1. Who is known as the father of modern genetics for his work with pea
plants?
A) Charles Darwin
B) Gregor Mendel
C) James Watson
D) Francis Crick
Correct Answer: Gregor Mendel
Rationale: Gregor Mendel is recognized as the father of genetics for
establishing the basic laws of inheritance through his experiments with pea
plants in the 1860s. His work laid the foundation for modern genetics.
2. Mendel's label of "unit factors" are what we now refer to as:
A) Chromosomes
B) Alleles
C) Phenotypes
D) Genotypes
Correct Answer: Alleles
Rationale: Mendel's "unit factors" are what we now refer to as alleles.
Mendel's first postulate states that each trait is controlled by "unit factors"
(alleles) that occur in pairs in individual organisms.
3. Which of the following statements about Mendel's unit factors is correct?
A) Mendel's label of "unit factors" are what we now refer to as chromosomes
,B) Genetic characteristics are controlled by unit factors that exist in pairs
C) Each gamete carries both unit factors for a trait
D) Unit factors are always identical to the phenotype
Correct Answer: Genetic characteristics are controlled by unit factors that
exist in pairs
Rationale: Mendel's first postulate states that each trait is controlled by "unit
factors" (alleles) that occur in pairs in individual organisms. These pairs
separate during gamete formation, but in the organism itself they exist as
paired determinants of phenotype.
4. What is Mendel's First Law?
A) Law of Independent Assortment
B) Law of Segregation
C) Law of Dominance
D) Law of Unit Factors
Correct Answer: Law of Segregation
Rationale: Mendel's First Law is the Law of Segregation. It states that during
gamete formation, the two alleles for a gene separate so that each gamete
receives only one allele.
5. What does the Law of Segregation state?
A) Alleles for different traits are inherited independently
B) Dominant alleles always mask recessive alleles
C) During gamete formation, the two alleles for a gene separate so that each
gamete receives only one allele
, D) Genes are located on specific positions on chromosomes
Correct Answer: During gamete formation, the two alleles for a gene
separate so that each gamete receives only one allele
Rationale: The Law of Segregation states that during gamete formation, the
two alleles for a gene separate so that each gamete receives only one allele.
This is Mendel's First Law.
6. What is Mendel's Second Law?
A) Law of Segregation
B) Law of Dominance
C) Law of Independent Assortment
D) Law of Unit Factors
Correct Answer: Law of Independent Assortment
Rationale: Mendel's Second Law is the Law of Independent Assortment. It
states that alleles of different genes assort independently of one another
during gamete formation.
7. What does the Law of Independent Assortment state?
A) During gamete formation, the two alleles for a gene separate
B) Alleles of different genes assort independently of one another during
gamete formation
C) Dominant alleles always mask recessive alleles
D) Genes are located on specific positions on chromosomes
