Practice Questions

TLS Online TPP Program

#Question id: 11163

The reason that paralogous genes can diverge from each other within the same gene pool, whereas orthologous genes diverge only after gene pools are isolated from each other, is that

#XL - S Microbiology

having multiple copies of genes is essential for the occurrence of sympatric speciation in the wild.
paralogous genes can occur only in diploid species; thus, they are absent from most prokaryotes.
polyploidy is a necessary precondition for the occurrence of sympatric speciation in the wild.
having an extra copy of a gene permits modifications to the copy without loss of the original gene product.

More Questions

TLS Online TPP Program

#Question id: 2680

#XL - T Zoology

What is alphoid DNA?

TLS Online TPP Program

#Question id: 2140

#XL - S Microbiology

According to the current model for HIV infection, which of the following is not involved in the process of membrane fusion?

TLS Online TPP Program

#Question id: 12934

#XL - S Microbiology

Reverse transcriptase enzyme is isolated from____

TLS Online TPP Program

#Question id: 5847

#XL - T Zoology

A Holliday structure is a(n)

TLS Online TPP Program

#Question id: 11332

#XL - T Zoology

The most plausible hypothesis to explain why species richness is higher in tropical than in temperate regions is that

A) tropical communities are older.

B) tropical regions generally have more available water and higher levels of solar radiation.

C) higher temperatures cause more rapid speciation.

D) diversity increases as evapotranspiration decreases.