Genetics (BIOD 210) Module 1 Practice Questions
2026 | Questions & Answers PDF
1. Where within a cell are chromosomes primarily located?
Mitochondria
Nucleus
Cytoplasm
Cell membrane
2. Which describes the relationship between a genotype, a phenotype, and an
organism's experiences?
A genotype is an organism's allele combination, which may be
influenced by the organism's experiences. A phenotype is the physical
appearance of a trait in an organism.
A phenotype is an organism's allele combination. A genotype is the
physical appearance of a trait in an organism, which may be
influenced by the organism's experiences.
A genotype is an organism's allele combination. A phenotype is the
physical appearance of a trait in an organism, which may be
influenced by the organism's experiences.
A phenotype is an organism's allele combination, which may be
influenced by the organism's experiences. A genotype is the physical
appearance of a trait in an organism.
3. What is spontaneous generation?
life generally arises from nonliving matter
the theory describing life deriving from previous life forms
the current scientifically-accepted theory of the origin of life
, an archaic scientific theory which stated that living organisms could
arise from nonliving matter
4. Unlike all other mammals, and ancestral humans, many humans of western
European dissent express an enzyme that allows them to digest milk sugar
(lactose) as adults. What best describes the change that allowed this?
Acclimation or chronic changes
new evolutionary adaptation
Acute change
5. Describe how epigenesis differs from the concept of preformation in
embryonic development.
Epigenesis involves a series of developmental events, while
preformation suggests that the organism is fully formed in miniature
within the egg.
Epigenesis is based solely on genetic inheritance, while preformation
relies on environmental influences.
Epigenesis occurs only in plants, whereas preformation occurs in
animals.
Epigenesis suggests that development is random, while preformation
is systematic.
6. Which nitrogenous base is represented by the letter 'G' in DNA?
Thymine (T)
Cytosine (C)
Adenine (A)
Guanine (G)
, 7. Describe the significance of genes in the field of genetics.
Genes are involved in the process of photosynthesis.
Genes are responsible for the physical structure of cells.
Genes are fundamental units of heredity that determine the traits
passed from parents to offspring.
Genes are only relevant in the context of evolutionary biology.
8. What does the term 'diploid number' (2n) refer to in genetics?
The variation in chromosome number among different species.
The total number of chromosomes in a gamete.
The specific number of chromosomes that each organism carries in
its cells.
The number of chromosomes present in a single set.
9. Describe the significance of homologous chromosomes in the context of
inheritance.
Homologous chromosomes are identical and do not vary.
Homologous chromosomes are important for inheritance because
they ensure that offspring receive one allele from each parent for
the same trait.
Homologous chromosomes only affect physical traits.
Homologous chromosomes are not involved in inheritance.
10. The wildtype allele of a gene is . . .
always dominant.
considered to be the standard "normal" allele.
2026 | Questions & Answers PDF
1. Where within a cell are chromosomes primarily located?
Mitochondria
Nucleus
Cytoplasm
Cell membrane
2. Which describes the relationship between a genotype, a phenotype, and an
organism's experiences?
A genotype is an organism's allele combination, which may be
influenced by the organism's experiences. A phenotype is the physical
appearance of a trait in an organism.
A phenotype is an organism's allele combination. A genotype is the
physical appearance of a trait in an organism, which may be
influenced by the organism's experiences.
A genotype is an organism's allele combination. A phenotype is the
physical appearance of a trait in an organism, which may be
influenced by the organism's experiences.
A phenotype is an organism's allele combination, which may be
influenced by the organism's experiences. A genotype is the physical
appearance of a trait in an organism.
3. What is spontaneous generation?
life generally arises from nonliving matter
the theory describing life deriving from previous life forms
the current scientifically-accepted theory of the origin of life
, an archaic scientific theory which stated that living organisms could
arise from nonliving matter
4. Unlike all other mammals, and ancestral humans, many humans of western
European dissent express an enzyme that allows them to digest milk sugar
(lactose) as adults. What best describes the change that allowed this?
Acclimation or chronic changes
new evolutionary adaptation
Acute change
5. Describe how epigenesis differs from the concept of preformation in
embryonic development.
Epigenesis involves a series of developmental events, while
preformation suggests that the organism is fully formed in miniature
within the egg.
Epigenesis is based solely on genetic inheritance, while preformation
relies on environmental influences.
Epigenesis occurs only in plants, whereas preformation occurs in
animals.
Epigenesis suggests that development is random, while preformation
is systematic.
6. Which nitrogenous base is represented by the letter 'G' in DNA?
Thymine (T)
Cytosine (C)
Adenine (A)
Guanine (G)
, 7. Describe the significance of genes in the field of genetics.
Genes are involved in the process of photosynthesis.
Genes are responsible for the physical structure of cells.
Genes are fundamental units of heredity that determine the traits
passed from parents to offspring.
Genes are only relevant in the context of evolutionary biology.
8. What does the term 'diploid number' (2n) refer to in genetics?
The variation in chromosome number among different species.
The total number of chromosomes in a gamete.
The specific number of chromosomes that each organism carries in
its cells.
The number of chromosomes present in a single set.
9. Describe the significance of homologous chromosomes in the context of
inheritance.
Homologous chromosomes are identical and do not vary.
Homologous chromosomes are important for inheritance because
they ensure that offspring receive one allele from each parent for
the same trait.
Homologous chromosomes only affect physical traits.
Homologous chromosomes are not involved in inheritance.
10. The wildtype allele of a gene is . . .
always dominant.
considered to be the standard "normal" allele.
