Answer:
Part A....B
Part B....C
Explanation:
It should be understood that Mice are always first used to clinical test especially for drugs or other things that are supposed to be for human use, this is because Mice and human genetic disorders have arisen from conserved and related evolutionary processes. Therefore, when the clinical trial or test produces a positive result in the Mice, it is almost certain that the result will be the same in human.
Now in part B. When the result result is different, it might be because of the differences in anatomy and physiology might hide or change development and symptoms of disease. And that is the reason why, the result of a particular drug differs from person to person.
<h2>Gelatin </h2>
Explanation:
Gelatin is a differential medium which tests the ability of an organism to produce an exoenzyme, called gelatinase (this enzyme hydrolyzes gelatin)
When gelatin is at a temperature below 32°C (or within a few degrees thereof), it is a semisolid material and at temperatures above 32°C, it is a viscous liquid
When gelatin is broken down, it can no longer solidify and if an organism can break down gelatin, the areas where the organism has grown will remain liquid even if the gelatin is refrigerated
No the conclusion by student is not right because the tube must be runny after incubation followed by refrigeration to be considered gelatinase positive
Answer:
Democritus who was a Greek philosipher, believed that everything was made from tiny little indesrtuctible and undividable spheres called atoms at 400 B.C.E. Thomson believed that atoms were positively charged spheres of matter with electrons being randomly scattered in them in 1904
Answer: Primary succession begins in barren areas, such as on bare rock exposed by a retreating glacier. The first inhabitants are lichens or plants—those that can survive in such an environment. Over hundreds of years these “pioneer species” convert the rock into soil that can support simple plants such as grasses. These grasses further modify the soil, which is then colonized by other types of plants. Each successive stage modifies the habitat by altering the amount of shade and the composition of the soil. The final stage of succession is a climax community, which is a very stable stage that can endure for hundreds of years.
Explanation:
Answer:
Jack is totally free from the disorder and there is zero chance that any of Jack and his normal height fiance's children will have this disease. However, the probability will definitely change if Jack marries someone with the disorder.
Explanation:
The fears of Jack's fiance and future in-laws can be allayed as follows:
Since achondroplasia (a condition characterized by dwarfism and other physical disorders) is an autosomal dominant disorder, it takes only one mutant allele of the gene for the disease to manifest. Consequently, individuals is either affected for the disorder or free from it, there is zero chance of being a carrier.
Jack is free from the disorder because he must have inherited normal alleles from his parents, meaning that each of the parents had one mutant allele and one normal allele for the gene. The 2 siblings of Jack must have inherited the mutant alleles in his stead.
If A represents the allele for the disorder, Jack's parents must have been Aa
Aa x Aa = AA (affected), Aa (affected), Aa (affected), aa (not affected)
Jack is the child with aa.
<em>Hence, Jack is totally free from the disorder and there is zero chance that any of Jack and his normal height fiance's children will have this disease. However, the probability will definitely change if Jack marries a dwarf or someone with the disorder.</em>
