Which of the following statements is INCORRECT regarding the assembly of DNA into higher-order chromatin structure?

I. Histone H1 is not part of the histone octamer, but binds to linker DNA and is responsible for higher-order chromatin structure.

II. The 30 nm fibers of a chromosome are attached to a/an RNA-protein scaffold that holds the fibers in large loops.

III. It is not possible for linear DNA to be supercoiled. Only circular DNA, which has no ends, can have regions of supercoiling.

IV. Core histones lacking their amino-terminal tails are capable of forming 30-nm fibers as they help to stabilize the 30-nm fiber in internucleosomal interactions.

#Question id: 3314

#Unit 11. Evolution and Behavior

The body weight of offspring of bird species is range between 12 gm to 18 gm. In a laboratory experiment, species was subjected to selection pressure having influence on the offspring body weight. After many generations of experimental selection pressure, the body weight range between 14 gm to 16 gm. Which of the following natural selection operate on this species?

#Question id: 3315

#Unit 11. Evolution and Behavior

Which one of the following statements is TRUE for Negative-frequency dependent selection?

#Question id: 3316

#Unit 11. Evolution and Behavior

There are two population A (N = 500) and B (N=50). Due to genetic drift, both populations will lose its genetic diversity in a generation. Such losses become magnified over many generations. After 20 generations, what will be lose its original variation?

#Question id: 3317

#Unit 11. Evolution and Behavior

Which of the following statements is NOT correct regarding effect of genetic drift?

#Question id: 3318

#Unit 11. Evolution and Behavior

When members of a metal- torerant and metal sensitive species that initially occupied the same habitat within the same range diverge into two species due to starting to show a change in their flowering season. This process known as

#Question id: 3319

#Unit 11. Evolution and Behavior

What will be the approximate effective population size in a panmictic population of 240 with 200 females and 40 polygamous males?