Answer:
When directed mutagenesis which is also called reverse genetics is used, only a single mutation per genome is introduced. In contrast, the number of mutations per genome introduced by random mutagenesis is usually difficult to control. It is likely that the strain you obtained with a mutation in gene X after random mutagenesis contained an additional mutation or perhaps multiple mutations which ultimately was/were responsible for loss of virulence in your favorite pathogen.
They are the same because if u simplify both fractions they are both 1/4
<h2>Koch's Postulates.</h2>
Explanation:
The next step should be isolate the microorganism from the mice and check if it is identical to the original microbe.
According to Koch's postulates, a microbe can be considered as a causative agent of a disease only after all the following are established:
- The microorganism should be present in all the organism suffering from the disease.
- The isolated microorganism should be grown in pure culture.
- The organism grown in the culture should be reintroduced in the susceptible but healthy host.
- Finally the microorganism must be re-isolated from the experimental host an cultured to see whether it is identical to the original specific microorganism.
The question is incomplete as it does not have the option which are:
- Favorable genes from parental generations provide advantageous characteristics to the hybrid species.
-
Hybridization produces offspring traits that allow different species to survive in extreme environments.
-
Inherited traits passed on from parental generations make hybrid species more susceptible to disease.
-
Hybrid species display more adaptation due to their reduced genetic diversity
Answer:
Favorable genes from parental generations provide advantageous characteristics to the hybrid species.
Explanation:
The white cattail is the plants which grow in the wetlands that are they are adapted to grow in the wetlands. The white cattail species in nature is the result of natural hybridization that is mixing of the genes of two different species of the same genus.
The white cattail can when grown in the Midwestern states well adapted to grow in that area and the reason for this could be accounted that the genes from the parental plants provided many advantages to the newly formed hybrid species.
Thus, the selected option is correct.
