WGU C653 HEREDITY AND GENETICS
COMPREHENSIVE SCRIPT 2026 QUESTIONS
AND SOLUTIONS
◉ What is the relationship between genes, proteins, and traits?
Answer: Genes provide the blueprint for proteins, which determine
an organism's traits.
◉ What are genes? Answer: A segment of DNA that has information
to produce a functional protein. Provides the blueprint that
determines organism's traits
◉ What is a protein? Answer: Functional molecules that are the final
producet of genes, performing cellular functions
◉ What is a trait? Answer: Any characteristic that an organism
displays
◉ What is gene expression? Answer: The central dogma!
The process of DNA being transcribed to RNA, which is then
translated into protein.
◉ What is replication? Answer: DNA to DNA
,◉ What is transcription? Answer: DNA to RNA
◉ What is translation? Answer: RNA to protein
◉ What are the four levels of organization for traits? Answer:
Molecular, Cellular, Organismal, Population.
◉ What is the molecular level of organization? Answer: Pigment
gene existing as two different alleles
EX. An allele for light and one for dark pigmentation
◉ What is the cellular level of organization? Answer: One enzyme
works well and one enzyme doesn't work as well, creating
differences in pigments
EX. Better working enzyme create darker pigment and not as well
working enzyme makes lighter pigment
◉ What is the organismal level of organization? Answer: Traits seen
at the organism level come from molecular and cellular properties
EX. Dark or light butterfly
◉ What is the population level of organization? Answer: Species
traits are selected based on survival and reproduction
, EX. Dark butterflies in forested regions and light butterflies in
unforested regions
◉ How do the levels or organization not necessarily impact
population? Answer: Because the population is all organisms at a
whole and not a single organism. At the population level, mutations
or sequence differences have to be selected for over time to be seen
at a population level.
◉ What is genetic variation? Answer: Differences in inherited traits
among individuals within a population.
◉ Why is genetic variation necessary for evolution? Answer: It
allows organisms to adapt better to their environment.
◉ What is the norm of reaction? Answer: How genes and the
environment interact
◉ What is PKU? Answer: Two people can have the same disease, but
one that controls their diet/environment is fine doesn't have
disease, but the one that doesn't control their diet/environment has
the disease
◉ What is a diploid? Answer: 2 homologous versions of each
chromosome
COMPREHENSIVE SCRIPT 2026 QUESTIONS
AND SOLUTIONS
◉ What is the relationship between genes, proteins, and traits?
Answer: Genes provide the blueprint for proteins, which determine
an organism's traits.
◉ What are genes? Answer: A segment of DNA that has information
to produce a functional protein. Provides the blueprint that
determines organism's traits
◉ What is a protein? Answer: Functional molecules that are the final
producet of genes, performing cellular functions
◉ What is a trait? Answer: Any characteristic that an organism
displays
◉ What is gene expression? Answer: The central dogma!
The process of DNA being transcribed to RNA, which is then
translated into protein.
◉ What is replication? Answer: DNA to DNA
,◉ What is transcription? Answer: DNA to RNA
◉ What is translation? Answer: RNA to protein
◉ What are the four levels of organization for traits? Answer:
Molecular, Cellular, Organismal, Population.
◉ What is the molecular level of organization? Answer: Pigment
gene existing as two different alleles
EX. An allele for light and one for dark pigmentation
◉ What is the cellular level of organization? Answer: One enzyme
works well and one enzyme doesn't work as well, creating
differences in pigments
EX. Better working enzyme create darker pigment and not as well
working enzyme makes lighter pigment
◉ What is the organismal level of organization? Answer: Traits seen
at the organism level come from molecular and cellular properties
EX. Dark or light butterfly
◉ What is the population level of organization? Answer: Species
traits are selected based on survival and reproduction
, EX. Dark butterflies in forested regions and light butterflies in
unforested regions
◉ How do the levels or organization not necessarily impact
population? Answer: Because the population is all organisms at a
whole and not a single organism. At the population level, mutations
or sequence differences have to be selected for over time to be seen
at a population level.
◉ What is genetic variation? Answer: Differences in inherited traits
among individuals within a population.
◉ Why is genetic variation necessary for evolution? Answer: It
allows organisms to adapt better to their environment.
◉ What is the norm of reaction? Answer: How genes and the
environment interact
◉ What is PKU? Answer: Two people can have the same disease, but
one that controls their diet/environment is fine doesn't have
disease, but the one that doesn't control their diet/environment has
the disease
◉ What is a diploid? Answer: 2 homologous versions of each
chromosome
