Answer:
DNA from a gene of interest can be inserted into a plasmid, then the modified plasmid can be inserted into a bacterial cell to replicate a gene of interest many times.
Explanation:
Plasmids are the extra-chromosomal circular DNA present in bacterial cells. Plasmids are able to replicate themselves independent of genetic DNA. Their ability to self replicate allows them to maintain themselves in the bacterial cells. This is why plasmids are used as cloning vectors in recombinant DNA technology.
A gene of interest is isolated from the donor cell and is inserted into the plasmid. The recombinant plasmid is introduced into bacterial cells where it replicates the ligated desired gene and allows the gene cloning. For example, the human insulin gene is ligated with plasmid and the recombinant plasmid is introduced in <em>E. coli</em> where it replicates the human insulin gene and allows the production of desired copies of the gene.
Answer:
The correct option is C. Rare alleles tend to remain rare even when they are dominant.The distribution of a gene among individuals is determined by mating and environmental factors.
Explanation:
Most people believe that a rare allele would only be recessive. But this is not correct. A rare allele can be dominant. The frequency of an allele to occur in a population will depend on the environmental factors. The alleles which code for traits that are best suitable for living in an environment will be seen in more abundance. The frequency of an allele to occur in a population also depends on the breeding trends of the population.
There’s actually 100 but only 8 of them infect humans
Coniferous trees dominate Boreal forests rather than tundra because of the lack of permanently frozen soil.
a lack of permanently frozen soil.
<u>Explanation:</u>
Boreal forests are characterized by a cold but not so cold weather. This means that it is too cold for the growth of deciduous trees. When it comes to the growth of tundra, the weather isn’t cold enough for the growth of tundra.
Tundra requires permafrost which is a permanently frozen layer of ground . The Boreal forests lack permafrost and thus isn’t suitable for the growth of tundra vegetation.
