A scientist's primary concern in a clinical trial is the patient's safety, there fore short observation decreases the reliability of results from a clinical trial
Answer:
C. A short observation period
Explanation:
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For four o'clock flowers, flower color is a case of incomplete dominance. The gene for flower color has two alleles: red (R) and white (r). What is the percent probability that one offspring from a parent with red flowers a second parent with white flowers will have genotype rr?
0%
For four o'clock flowers, flower color is a case of incomplete dominance. The gene for flower color has two alleles: red (R) and white (r). What is the percent probability that one offspring from a parent with the genotype RR and a second parent with the genotype rr will have red flowers?
Answer:
0%
Explanation:
According to the question, the inheritance pattern of flower colour in four o'clock plants follow incomplete dominance i.e. one allele is not completely dominant over the other, and instead they form a heterozygous plant with a third intermediate phenotype (flower colour).
In this case, a four o'clock plant with genotype RR will have red flowers while a plant with genotype rr will have white flowers, Hence, they cross to form an all Rr genotype offsprings with pink flowers (since the red allele is incompletely dominant). Therefore, the percentage chance of having a red flower offspring from this cross is 0%, as it cannot occur.
The structure of virus consists of viral genome, nucleocapsid, tegument, envelope, and envelope protein. The genome is present in the Nucleocapsid.
The simplest of viruses are composed of genetic material and protein or capsid. Viruses do not produce many structural elements however some viruses may have an additional proteinaceous structure around the genetic material called nucleocapsid and a lipid bilayer covering the outer capsid layer called the envelope. The capsid is there to protect the genetic material from degradation. The viral envelope is derived from the host cell membrane and the virus encoded proteins. The sugar moieties attached to those proteins and this feature influences and contributes to the host specificity, host-parasite interaction etc.
The nucleocapsid protein is encoded by the gag gene in HIV virus and in coronavirus, it is the one present in greatest abundance and highly antigenic.
The virus structure varies among the different families and at the least has a capsid and in some there might be a nucleocapsid additionally covering the genetic material of the virus. It is either a capsid or the nucleocapsid and capsid that covers the genetic material.
The viral genetic material is covered by capsid and nucleocapsid.
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B. 20
C. 10
D. 0
E. 1/2
Answer: Option C
Out of the 20 resulting offspring of the test cross, 10 (50%) will be tall.
Explanation:
Let True-breeding tall plant be "TT"
Let short plant be tt
On crossing, all offspring will be "Tt"
Test cross involves the breeding of an individual with a phenotypically recessive individual. The test cross of offspring "Tt" against "tt" will then yield an equal ratio (1:1) of Tt to tt.
Thus, out of the 20 resulting offspring of the test cross, only 10 (50%) will be tall.
When a true-breeding tall pea plant is crossed with a short plant, all the F1 offspring will be heterozygous tall. Upon performing a test cross of a heterozygous F1 tall plant with a short plant, about half of the resulting offspring should be tall. Thus, out of 20 offspring, approximately 10 (Option C) should be tall.
In garden peas, the allele for tall plants (T) is dominant over the allele for short plants (t). A true-breeding tall plant has two copies of the dominant allele (TT), while a short plant has two recessive alleles (tt). When you perform a test cross between a heterozygous tall plant (Tt) and a short plant (tt), the results should theoretically yield a 1:1 ratio of tall to short offspring. Since the question states the tall plant is true-breeding and crossed with a short plant, all offspring from this initial cross would be heterozygous tall (Tt). Each of these offspring, when test crossed with a short (tt) plant, would produce tall and short offspring in a 1:1 ratio.
Therefore, out of 20 offspring from the test cross, approximately half should be tall and half should be short. So, the expected number of tall offspring would be about 10.
The correct answer to the question is option C- 10.
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Answer : Option C) Non explosive, producing large amounts of lava.
Explanation : The divergent volcanoes has the tendency of being non-explosive in nature. They help in producing large amounts of lava. The lava production is increased in these volcanoes.