TLS Online TPP Program

#Question id: 7177


Following statements are regarding to the early development in nematodes. Which of the following is incorrect?

#Unit 5. Developmental Biology
  1. At the 4-cell stage, the EMS cell requires a signal from its neighbor (and sister cell), the P2 blastomere. Usually, the EMS cell divides into an MS cell (which produces mesodermal muscles) and an E cell (which produces the intestinal endoderm).
  2. If the P2 cell is removed at the early 4-cell stage, the EMS cell will divide into two E cells, and endoderm will be produced.
  3. If the EMS cell is recombined with the P2 blastomere, however, it will form endoderm; it will not do so, however, when combined with ABa, ABp, or both AB derivatives.
  4. Specification of the MS cell begins with maternal SKN-1 activating the genes encoding transcription factors such as MED-1 and MED-2. 
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TLS Online TPP Program

#Question id: 3409

#Unit 9. Evolution & Diversity of Life Forms

All genetic drift arises from sampling error, but there are several different ways in which sampling error can arise as a following

a. Reduced population size

b. Founder effect

c. Genetic bottleneck

d. Mate choice

Which of the following above way cause sampling error in succeed generation?

TLS Online TPP Program

#Question id: 3410

#Unit 9. Evolution & Diversity of Life Forms

1200 Birds population are present around costal area with allelic frequency of M1 .60 and M2 .40. During rainy time 200 birds come from nearest forest which has .30 frequency of M1 and .70 of M2 allele.  What will be allelic frequency of M2 in their recipient population of costal area?

TLS Online TPP Program

#Question id: 3411

#Unit 9. Evolution & Diversity of Life Forms

The frequencies of two allele’s p and q for a gene locus in a population are 0.8 and 0.2, respectively. Population show inbreeding with value of F is .25, Assume that the population is infinitely large and no other evolutionary force is acting. The heterozygote frequency will be 

TLS Online TPP Program

#Question id: 3412

#Unit 9. Evolution & Diversity of Life Forms

What will be frequency of inbreeding coefficient between G and H?

TLS Online TPP Program

#Question id: 3413

#Unit 9. Evolution & Diversity of Life Forms

 Following certain conditions is present in a population?

A- Large Population

B- Each locus carries two allele 

C- Sexual selection 

D- Frequency dependent selection  

E- No linkage between genes

Which of the following above condition allowed to validity of Hardy- Weinberg Prediction?

TLS Online TPP Program

#Question id: 3414

#Unit 9. Evolution & Diversity of Life Forms

The given below is the graphical representation of the changes in morphological features over a period of the geological time scale, where population A accumulates heritable morphological features and give rise to distinct species B. Population B splits in to a distinct species B1 and B2 Which of the following lineage represent the pattern of speciation by cladogenesis?