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Chapter 25: Q32CP (page 933)

What fraction of the human genome consists of transposons and retrotransposons?

Short Answer

Expert verified

The fraction of the human genome that consists of transposons and retrotransposons are 3/100 and 2/3 respectively.

Step by step solution

01

Transposons

Transposons, specifically DNA transposons, are transposable elements that don鈥檛 involve any intermediates and account for approximately 3% of the human genome. However, in most cases, they are inactive.

02

Retrotransposon

Retrotransposons are those genetic components that exhibit transposition through a pathway similar to the replication of retroviruses. They account for about two-thirds of the human genome.

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Most popular questions from this chapter

During bacterial conjugation, two cells of the same or similar species make close contact and transfer genetic information. In the donor cell, an endonuclease nicks the DNA so that a single strand can enter the recipient cell. Explain why the stable incorporation of the transferred DNA requires RecBCD activity in the recipient cell.

To put the E. colireplication system on a human scale, let us imagine that the20 - A-diameter B-DNA was expanded to1 min diameter. If everything were proportionally expanded, then each DNA polymerase holoenzyme would be about the size of a medium-sized truck. In such an expanded system: (a) How fast would each replisome be moving? (b) How far would each replisome travel during a complete replication cycle? (c) What would be the length of an Okazaki fragment? (d) What would be the average distance a replisome would travel between each error it made? Provide your answers in km/hrand km.

Give the name of the enzyme that catalyzes each of the following reactions: (a) Makes a DNA strand from a DNA template

(b) Makes a DNA strand from an RNA template

(c) Makes an RNA strand from a DNA template

Why is it necessary to use only the Klenow fragment, rather than intact , in DNA sequencing reactions (Sections and )?

Explain why mutations are more likely to occur on the lagging strand than on the leading strand in eukaryotes
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