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When a foreign DNA is introduced in to an organism, how it is maintained in the host and how it is transferred to the progeny of the organism

Monjur Alahi

When a foreign DNA is introduced in to an organism, how it is maintained in the host and how it is transferred to the progeny of the organism


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Salim Ahmed Kawsar

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Foreign gene is usually ligated to a plasmid vector and introduced in the host. As plasmid replicates, and makes multiple copies of itself, so does the foreign gene gets replicated and its copes are made. When the host organism divides, its progeny also receives the plasmid DNA containing the foreign gene.

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The body of an organism is streamlined and has feathers on its body. Identify the organism and write one specific feature of it.

Aves.  Specific feature of Aves is that they are warm –blooded having a four chambered heart and modified forelimbs for flight.

1 Answers 1 views
Differentiate between the followings: (a) Repetitive DNA and Satellite DNA (b) mRNA and tRNA (c) Template strand and Coding strand

(a) Repetitive DNA and satellite DNA satellite DNA Repetitive DNA Satellite DNA Repetitive DNA are DNA sequences that contain small segments, which are repeated many times. Satellite DNA are DNA sequences that contain highly...

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An extra chromosomal segment of circular DNA is used to carry gene of interest into the host cell. What is the name given to it ?

Answer is: Plasmid

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In recombinant DNA technology, vectors are used to transfer a gene of interest in the host cells.

(i) Have origin of replication(Ori) (ii) a selectable marker (iii) at least one recognition site.

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In GIFT, gametes are transferred to the fallopian tube. Can gametes be transferred to the uterus to achieve the same result? Explain.

The uterine environment is not congenial for the survival of the gamete. If, directly transferred to the uterus they will undergo degeneration or could be phagocytosed and hence viable zygote would not...

1 Answers 1 views
When a foreign DNA is introduced in to an organism, how it is maintained in the host and how it is transferred to the progeny of the organism?

Foreign gene is usually ligated to a plasmid vector and introduced in the host. As plasmid replicates and makes multiple copies of itself, so does the foreign gene gets replicated...

1 Answers 1 views
What are chromosomes? Explain how in sexually reproducing organisms the number of chromosomes in the progeny is maintained.

Chromosomes are thread-like structures, made of proteins and DNA, found in the nucleus at the time of cell division. In sexually reproducing organisms, the gametes undergo meiosis, and hence, each gamete...

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Why had the Indian govt. put barriers to foreign trade and foreign investments after independence? Analyse the reasons.

The Indian government has put barriers to foreign trade and foreign investments after independence because:  (i) It wanted to protect the producers within the country from foreign competition.  (ii) As the Industries...

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There are 1225 employees in an organization, out of which 40% got transferred to different places. How many such employees got transferred ?

(b) Number of transferred employees = 40% of 1225 =1225 x 40/100 =490

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If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is:

d. Sex-linked recessive

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