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Bio 219 Exam 1 – Questions And Answers – Rated A+
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Bio 219 Exam 1 – Questions And Answers – Rated A+COVID-19 is a virus. Right Ans - False
Which of the following is true about Sars-Cov2 Right Ans - It is an RNA
virus
What is the name of the receptor that is cleaved by TMPRSS2 and binds to the
S protein for viral binding to host cell membrane? Right Ans - ACE2
Approximately 17%-35% of hospitalized patients with COVID-19 are treated
in an ICU, most commonly due to Right Ans - Hypoxemic respiratory failure
What is the most sensitive detection for Sars-Cov2? Right Ans - PCR
Transmission of Sars-Cov-2 occurs primarily via Right Ans - respiratory
droplets from face-to-face contact.
Please pick the best answer. Right Ans - 1. Fully vaccinated people with
Delta variant breakthrough infections can spread the virus to others.
However, vaccinated people appear to be infectious for a shorter period:
2.Some data suggest the Delta variant might cause more severe illness than
previous strains in unvaccinated persons.
3. Unvaccinated people remain the greatest concern
Growing evidence suggests that the coronavirus causes 'brain fog' and other
neurological symptoms through multiple mechanisms. Right Ans - True
PCR stands for Right Ans - Polymerase Chain Reaction
Viruses constantly change through Right Ans - mutation
What is a characteristic of full dominance? Right Ans - The phenotypes of
homozygous and heterozygous genotypes are the same.
Phenotype is not only determined by genotype. What other factors influence
phenotype? Right Ans - environment and gene interaction
, In some situations, what is the result when two viable single mutants are
crossed? Right Ans - a synthetic lethal
Which type of interaction would result in the standard Mendelian ratio of
9:3:3:1? Right Ans - There is no gene interaction and the two mutations are
on different chromosomes.
DNA stands for Right Ans - Deoxyribonucleic Acid
Complete dominance occurs when the phenotype of the heterozygote is
indistinguishable from that of the homozygous parent, as is the case with the
pea plant example. Right Ans - true
Sickle-cell anemia is a disease that affects the type of hemoglobin (Hb) a
person makes in his or her red blood cells. Consider the case of Martin and
Cindy, who are the parents of Mary. Martin has sickle-cell anemia with
abnormal hemoglobin, and his genotype is HbS/HbS. Cindy has normal
hemoglobin, and her genotype is HbA/HbA. Their child Mary carries the
sickle-cell trait and produces both normal hemoglobin and abnormal
hemoglobin. Mary's genotype is HbS/HbA.
What type of dominance pattern would result in Mary's blood producing both
normal and abnormal hemoglobin? Right Ans - codominance
The inheritance pattern for radish shape exhibits incomplete dominance. A
radish that is homozygous for the round allele is crossed with a radish that is
homozygous for the long allele.
What is the phenotypic outcome of the offspring that result from this cross?
Right Ans - All offspring have oval radishes.
Tail length in the manx cat is a trait that displays incomplete dominance.
There are two alleles for tail length, one for a long tail (TL) and one for no tail
(TN). Cats that are homozygous for the long-tail allele (TLTL) have long tails,
whereas heterozygous (TLTN) cats are tailless. Cats with the genotype
(TNTN) die during embryonic development.
If a long-tailed cat and a tailless cat have a litter of kittens, what are the
predicted phenotype percentages of the offspring? Right Ans - 50% long
tailed, 50% tailless
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