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TLS Online TPP Program

#Question id: 2916

Which of the following statement is INCORRECT regarding the packaging of DNA into higher order chromatin structure?

#Unit 2. Cellular Organization

  1. One of the two regions bound by H1 is the linker DNA at one end of the nucleosome. The second site of DNA binding is in the middle of the associated 147 bp (the only DNA duplex present at the dyad axis).

  2. Core histones that had undergone nuclease treatment are capable of forming 30-nm fibers. The most likely role of the tails is to stabilize the 30-nm fiber by interacting with adjacent nucleosomes.

  3. 30-nm fiber forms loops of 40–90 kb that are held together at their bases by a proteinaceous structure referred to as the nuclear scaffold abundant in Topoisomerase-II and SMC proteins.

  4. Positioning a nucleosome allows the DNA binding site for a regulatory protein to remain in the accessible linker DNA region as tightly positioned nucleosomes are most often found at sites directing the initiation of transcription.

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TLS Online TPP Program

#Question id: 3576

#Unit 8. Inheritance Biology

Which of the following most accurately restates Mendel's law of segregation?
TLS Online TPP Program

#Question id: 3577

#Unit 8. Inheritance Biology

Which is the most correct description of a dominant trait?
TLS Online TPP Program

#Question id: 3578

#Unit 8. Inheritance Biology

A locus is:
TLS Online TPP Program

#Question id: 3579

#Unit 8. Inheritance Biology

Following some statement is correct with monohybrid and Dihybrid cross?

A) Two alleles for gene segregate into gametes in equal proportions.

B) Monohybrid F2 phenotype 1:2:1 ratio conclude, there is no segregation in character

C)  Monohybrid F2 phenotype 3:1 ratio conclude, there is a no blending inheritance

D) Dihybrid F 2 phenotype 3:1 ratio conclude complete linkage
TLS Online TPP Program

#Question id: 3580

#Unit 8. Inheritance Biology

Different genetic cross regarding two independently assorting non allelic gene with complete dominance and their phenotypic ratio showed in a following. Which of the following is incorrect combination? 

Genetic cross

Phenotype ratio

1

AABb X AaBb

3:1

2

Aabb X  AaBb   

3:1:3:1

3

AABb X AaBB   

1:1 

4

Aabb X aaBb   

1:1:1:1

TLS Online TPP Program

#Question id: 3581

#Unit 8. Inheritance Biology

What is the probability that each of the following pairs of parents will produce the indicated offspring? (Assume independent assortment of all gene pairs.)

(a) AABBCc X  aabbcc → AaBbCc          (b) AABbCc  X AaBbCc → AAbbCC

(c) AaBbCc  X AaBbCc → AaBbCc         (d) aaBbCC  X  AABbcc → AaBbCc