Answer:
In order to produce human insulin in a bacterium you need to isolate the mature mRNA (after the excision of the introns), produce a DNA copy using the enzyme retrotranscriptase, clone the gene in an expression vector and transform bacterial cells with this genetic construct to produce the insulin.
Explanation:
Eukaryotic cells perform a process called splicing, in which introns (the non-coding fragments of the gene). are excised from the mRNA Prokaryotic cells (i.e. bacteria) don’t perform this process. So, in order to produce a recombinant protein in a bacterium, insulin in this case, the best strategy should be to produce a complementary DNA (cDNA) of the mature mRNA (AFTER the splicing process, the excising of the introns).
Answer:
However, the “bases” of RNA differ from those of DNA in that thymine (T) is replaced by uracil (U) in RNA. DNA and RNA bases are also held together by chemical bonds and have specific base pairing rules. In DNA/RNA base pairing, adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G).
The answer is B Because fat (myelin) acts as an insulator, membrane coated with myelin will not conduct an impulse.
Answer:
<h2>11.02</h2>
Explanation:
Predict the frequency of a+b+c progeny = 11.02
Step by step Explanation for all genes
a---8%----b---------24%--------c
Double cross overs = (RF at first locus × RF at second locus)/100
= 8 × 24 /100 =1.92
Double cross over progeny;
a b+ c =0.96
a+ b c+= 0.96
single cross over progeny;
RF = 8
SCO at first locus progeny= 8 -DCO progeny= 8- 1.92 = 6.08
a b+ c+= 3.04
a+ b c= 3.04
single cross over at second locus progeny---
RF = 24
SCO at second locus progeny= 24-DCO progeny= 24 - 1.92 = 22.02
abc+= 11.02;
a+b+c = 11.02;
Total recombinants = 1.92 + 6.08 + 22.02 = 30.02
Total nonrecombinants are = 100 - 30.02 = 69.98
abc = 34.99
a+b+c+ = 34.99.
The Afrikaners are an example of a founder effect that occurs when population and the random decrease in genetic variation is an example of genetic drift.
Explanation:
When some individuals from a population move to form a new colony, this phenomenon is called founder effect as in case of Afrikaners. The small population or group of individuals forming a new colony may not exhibit the full genetic diversity of the population they were once the part.
The alleles would get expressed in different frequencies than it would have in original population.
There are chances that some alleles are lost or missing also. The new colony formed has small population so chances of genetic drift are very strong.
Genetic drift does not depend upon the benefit or harmful effect of the alleles as it occurs merely by chance sampling. The small population of Afrikaners felt the effect of genetic variation hence strong genetic drift is seen in them.