WGU C785 Foundational Pre-Assessment Exam Questions with a focus on Module One and Key Marking Scheme 2024
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Course
WGU C785
Institution
WGU C785
WGU C785 Foundational Pre-Assessment Exam Questions with a focus on Module One and Key Marking Scheme 2024
Genome - correct answer the whole set of genes that a person has
Phenotype - correct answer observable characteristics or traits that arise from genotype, some are not easy seen like...
WGU C785 Foundational Pre-
Assessment Exam Questions with a
focus on Module One and Key
Marking Scheme 2024
Genome - correct answer the whole set of genes that a person
has
Phenotype - correct answer observable characteristics or traits
that arise from genotype, some are not easy seen like......
Ex blood type, color blindeness
Combinations of gametes from Two heterozygous parents( Bb +
Bb) - correct answer 5% of the offspring will have the
homozygous dominant BB genotype, 50% will have the
heterozygous Bb genotype, and 25% will have the homozygous
recessive bb genotype.
Punnett Square - correct answer A chart that shows all the
possible combinations of alleles that can result from a genetic cross
Dominant allele - correct answer An allele that dominates or
masks the presence of another allele, producing a dominant trait.
Ex B, dominant trait
Recessive allele - correct answer The allele, whose presence is
completely masked by a dominant allele, producing a recessive
trait.
Ex b recessive trait
Incomplete dominance - correct answer Produces different
phenotypes based on the combination of alleles present in the
heterzygotes.
,Ex hair (wavy)
Codominance - correct answer Occurs when the effects of both
alleles appear in the heterozygote (one allele is not dominated by
the other)
Ex. Blood type
Sex-linked traits - correct answer result from sex-linked
inheritance where the recessive trait predominantly impacts males
and a dominant trait can impact both males and females
Epigenetics - correct answer Study of how environmental and
lifestyle factors can impact gene expression; above the genome
Epigenetics and the Environment - correct answer Researchers
are studying how chromatin changes occur as a result of
environmental factors such as diet and smoking. These changes
occur via chemical modifications to both the DNA and the histone
proteins that do not change the DNA sequence but do initiate
epigenetic changes in chromatin structure that determine cellular
phenotype. In other words, environmental stimuli can influence
gene expression by altering how the DNA is packaged as
chromatin.
-to have huntingtons disease, you have to only have H in your gene.
Hh, HH. Only hh is normal and healthy
PCR and Genetic Testing
, KEY CONCEPTS - correct answer -Polymerase Chain Reaction
(PCR) is a tool used to amplify a specific segment of DNA.
-Genetic testing utilizes PCR to identify potential sources of genetic
disease in an individual or their offspring.
-The type of PCR product generated provides information about the
specific mutation and its accompanying phenotype.
Briefly explain the steps in a PCR cycle. - correct answer 1.)
Need template DNA strand. DNA strands are separated by heat.
(Denaturation - heated to 95C)
2.) Primers anneal to DNA strands. (Annealing - the reaction is
cooled to 50C)
3.) Extension of newly formed DNA by DNA Polymerase.
(Elongation - DNA pol works well at 70C, so the reaction is heated
to this temp - this enables DNA pol to add nucleotides and allows
building new strands of DNA.)
4.) Cycle repeats.
#1 TECHIQUE
Make primers that flank the mutation and sequence the product
#2 TECHIQUE
Use primers that stick to the mutation
- WILL HAVE LOW AMOUNT OF DNA/PRODUCT MADE, IF
MUTATION IS NOT PRESENT
Red-green color blindness - correct answer sex-linked human
disorders involving several genes on the X chromosome;
characterized by a malfunction of light-sensitive cells in the eyes;
affects mostly males but also homozygous females.
Antiparallel - correct answer ~ The opposite arrangement of the
sugar-phosphate backbones in a DNA double helix.
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