TLS Online TPP Program

#Question id: 7241


If planaria are irradiated at a dosage that destroys nearly all neoblasts. Transplanting a single clonogenic neoblast in this planaria results:

#Unit 5. Developmental Biology
  1. From this neoblast, dividing progenitor cells formed, ultimately producing cell types of all germ layer origins and also restores the organism’s capacity for regeneration.
  2. From this neoblast, dividing progenitor cells formed, ultimately producing cell types of all germ layer origins but do not restores the organism’s capacity for regeneration.
  3. cNeoblasts are not essential for regeneration, so only dividing progenitor cells formed for all germ layers.
  4. From this neoblast, the organism restores their capacity for regeneration but dividing progenitor cells not formed.
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TLS Online TPP Program

#Question id: 5721

#Unit 8. Inheritance Biology

There is paracentric inversion heterozygote ABCDEFG/ABFEDCG involved in double recombination during meiosis I within inverted region result in

A. dicentric and an acentric chromosome in meiosis I as the chiasmata get terminated.

B. appearance of deletion in both the cross over product

C. all gamete are viable

D. nonviable gametes from crossover products.

Which of the above statements are correct?

TLS Online TPP Program

#Question id: 5722

#Unit 8. Inheritance Biology

Meiotic products resulting from a single crossover within a pericentric inversion loop

A. This will generate a dicentric and an acentric chromosome following separation of chromosomes after crossing over

B. the inversion will completely suppress crossing over

C. All parental gametes that carry inversion chromosome are nonviable

D. All gametes from crossover products are non viable due to appearance of duplication of one arm and deletion of another arm

Which of the above statements are correct?

TLS Online TPP Program

#Question id: 5723

#Unit 8. Inheritance Biology

An individual heterozygous for a reciprocal translocation possesses the following chromosomes

I-  nonviability                                  II – Viability        

III- only translocated chromosome     IV- only normal chromosome

V- one translocated another normal

Which of the following above chromosome constituent and feature in their gamete result from?

A- alternate       B- adjacent-1     C- adjacent-2

TLS Online TPP Program

#Question id: 5724

#Unit 8. Inheritance Biology

Species I is diploid (2n  = 8) with chromosomes

AABBCCDD; related species II is diploid (2n = 8) with chromosomes MMNNOOPP. Individuals with the following sets of chromosomes represent what types of chromosome mutations?

A-   AAABBCCDD        B-   AABBCCDDMNOP

C-   AAABBCCDDD

TLS Online TPP Program

#Question id: 5725

#Unit 8. Inheritance Biology

An individual is having an inversion in heterozygous condition. The regions on normal chromosome are marked as A, B, C, D, E, F, G while the chromosome having inversion has the regions as a, b, e, d, c, f, g. The diagram given below shows pairing of these two homologous chromosomes during meiosis and the site of a crossing over is indicated:

The following statements are given to describe the inversion and the consequence of crossing over shown in the above diagram:

A. This is a paracentric inversion

B. This will generate a dicentric and an acentric chromosome following separation of chromosomes after crossing over

C. This will generate two recombinant chromosomes with deletion and other parental chrmosome following separation of chromosomes after crossing over

D. 50 % gametes will be non viable due to deletion or duplication of chromatids

E. The gametes having recombinant chromatid or parental inversion chromatids will be non-viable

TLS Online TPP Program

#Question id: 5726

#Unit 8. Inheritance Biology

Following diagram represents the sequence of genes in a normal chromosome of a plant species

CORRECT combination for chromosomal mutation using