Bio 219 Exam 1 Questions With Complete
Solutions
What is the most sensitive detection for Sars-Cov2? PCR
Transmission of Sars-Cov-2 occurs primarily via respiratory droplets from face-to-face
contact.
Please pick the best answer. 1. Fully vaccinated people with Delta variant breakthrough
i...
What is the most sensitive detection for Sars-Cov2? PCR
Transmission of Sars-Cov-2 occurs primarily via respiratory droplets from face-to-face
contact.
Please pick the best answer. 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. True
PCR stands for Polymerase Chain Reaction
, Bio 219 Exam 1 Questions With Complete
Solutions
Viruses constantly change through mutation
What is a characteristic of full dominance? The phenotypes of homozygous and
heterozygous genotypes are the same.
Phenotype is not only determined by genotype. What other factors influence phenotype?
environment and gene interaction
In some situations, what is the result when two viable single mutants are crossed? a
synthetic lethal
Which type of interaction would result in the standard Mendelian ratio of 9:3:3:1? There
is no gene interaction and the two mutations are on different chromosomes.
DNA stands for 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. true
, Bio 219 Exam 1 Questions With Complete
Solutions
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? 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? 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? 50% long tailed, 50% tailless
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