WGU C190 Intro to Biology Objective Assessment
Questions & Answers 2026 | Latest Review Guide
1. What is the primary role of the flagellum in a cell?
Energy production
Locomotion
Cell division
Protein synthesis
2. Describe how polygenic inheritance affects the phenotypic variation seen in
dog coat colors.
Polygenic inheritance is unrelated to the physical traits of organisms.
Polygenic inheritance leads to identical coat colors in all offspring.
Polygenic inheritance means that only one gene determines the coat
color of dogs.
Polygenic inheritance involves multiple genes contributing to a
single trait, resulting in a range of coat colors in dogs.
3. What is the first step in the process of DNA replication?
Unwinding of the DNA double helix
Separation of RNA primers
Formation of Okazaki fragments
Synthesis of new DNA strands
4. If a fish with the genotype RrLl is crossed with another fish of the same
genotype, what proportion of the offspring will have the genotype RrLl?
, 1/8
1/4
3/4
1/2
5. What is true about a eukaryotic cell?
C. It has a membrane-bound nucleus and organelles.
B. It has a cell wall containing peptidoglycan.
A. It does not occur in nature abundantly.
D. It is usually smaller than a prokaryotic cell.
6. Describe how the flagellum contributes to a cell's ability to move.
The flagellum acts as a whip-like structure that propels the cell
through its environment.
The flagellum aids in the synthesis of DNA.
The flagellum helps in the absorption of nutrients.
The flagellum is involved in cellular respiration.
7. What is the charge of a proton?
4.1357x10^-15 C
6.4x10^-19 C
8.2714x10^-15
3.2x10^-19 C
1.6x10^-19 C
,8. What is the term for the inheritance pattern that results in multiple
phenotypes, such as different coat colors in dogs?
Mendelian inheritance
Incomplete dominance
Polygenic inheritance
Codominance
9. In what phase of the cell cycle would it be if two cells are shown to be
pinching off with chromosomes in the middle of either cell?
anaphase
telophase
prophase
metaphase
Prometaphase
10. What is the name of the stage in the cell cycle where homologous
chromosomes are separated but sister chromatids remain together?
Meiosis II
Interphase
Meiosis I
Mitosis
11. Describe how sexual selection influences the physical traits of male
peacocks.
Sexual selection leads to the development of elaborate tail feathers
in male peacocks, as these traits are favored by females during
, mate selection.
Sexual selection results in male peacocks developing better
camouflage.
Sexual selection causes male peacocks to become smaller in size to
avoid predation.
Sexual selection has no impact on the physical traits of male
peacocks.
12. If sodium (Na) transfers one electron to chlorine (Cl), what type of bond is
formed, and what are the resulting ions?
Metallic bond; NaCl
Ionic bond; Na+ and Cl-
Hydrogen bond; NaH and Cl
Covalent bond; Na and Cl
13. What is the term for a biological polymer made up of amino acids?
Nucleic acid
Protein
Carbohydrate
Lipid
14. Which of the organisms listed below is a producer, making up the base of
the entire food web?
Killer Whales
Phytoplankton
Squid
Questions & Answers 2026 | Latest Review Guide
1. What is the primary role of the flagellum in a cell?
Energy production
Locomotion
Cell division
Protein synthesis
2. Describe how polygenic inheritance affects the phenotypic variation seen in
dog coat colors.
Polygenic inheritance is unrelated to the physical traits of organisms.
Polygenic inheritance leads to identical coat colors in all offspring.
Polygenic inheritance means that only one gene determines the coat
color of dogs.
Polygenic inheritance involves multiple genes contributing to a
single trait, resulting in a range of coat colors in dogs.
3. What is the first step in the process of DNA replication?
Unwinding of the DNA double helix
Separation of RNA primers
Formation of Okazaki fragments
Synthesis of new DNA strands
4. If a fish with the genotype RrLl is crossed with another fish of the same
genotype, what proportion of the offspring will have the genotype RrLl?
, 1/8
1/4
3/4
1/2
5. What is true about a eukaryotic cell?
C. It has a membrane-bound nucleus and organelles.
B. It has a cell wall containing peptidoglycan.
A. It does not occur in nature abundantly.
D. It is usually smaller than a prokaryotic cell.
6. Describe how the flagellum contributes to a cell's ability to move.
The flagellum acts as a whip-like structure that propels the cell
through its environment.
The flagellum aids in the synthesis of DNA.
The flagellum helps in the absorption of nutrients.
The flagellum is involved in cellular respiration.
7. What is the charge of a proton?
4.1357x10^-15 C
6.4x10^-19 C
8.2714x10^-15
3.2x10^-19 C
1.6x10^-19 C
,8. What is the term for the inheritance pattern that results in multiple
phenotypes, such as different coat colors in dogs?
Mendelian inheritance
Incomplete dominance
Polygenic inheritance
Codominance
9. In what phase of the cell cycle would it be if two cells are shown to be
pinching off with chromosomes in the middle of either cell?
anaphase
telophase
prophase
metaphase
Prometaphase
10. What is the name of the stage in the cell cycle where homologous
chromosomes are separated but sister chromatids remain together?
Meiosis II
Interphase
Meiosis I
Mitosis
11. Describe how sexual selection influences the physical traits of male
peacocks.
Sexual selection leads to the development of elaborate tail feathers
in male peacocks, as these traits are favored by females during
, mate selection.
Sexual selection results in male peacocks developing better
camouflage.
Sexual selection causes male peacocks to become smaller in size to
avoid predation.
Sexual selection has no impact on the physical traits of male
peacocks.
12. If sodium (Na) transfers one electron to chlorine (Cl), what type of bond is
formed, and what are the resulting ions?
Metallic bond; NaCl
Ionic bond; Na+ and Cl-
Hydrogen bond; NaH and Cl
Covalent bond; Na and Cl
13. What is the term for a biological polymer made up of amino acids?
Nucleic acid
Protein
Carbohydrate
Lipid
14. Which of the organisms listed below is a producer, making up the base of
the entire food web?
Killer Whales
Phytoplankton
Squid
