CSIR-NET (LIFE SCIENCE) PREPARATION

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Genetics-Solved Problem from Bacterial Genetic Recombination

Dr CharuSudan

Question: A co-transduction experiment was performed to decipher the linear order of 4 genes: w, x, y and z. Three sets of experiments were performed. In set 1, the Transductants were selected for gene w, in set 2, gene x was selected and in set-3, gene y was selected. In each set, the transductants were screened for co- transduction of the other markers.
Based on the frequencies of co-transduction,  identify the most likely order in the genome.                                                                          

1. w, x, y, z     2. x y z w         3. y z w x         4. w z x y

                                                                                     Based on question from CSIR-NET (2014) 

For answer and analysis

https://drive.google.com/file/d/0BzrbmUVc9aT3eVFFZjJSdFdLQWM/view?usp=sharing

GENETICS FOR CSIR-NET, GATE, MSc ENTRANCE

GENETICS: PROBLEMS, SOLUTIONS AND ANALYSIS-II

Dr CharuSudan

Today we deal with a very simple question.

Q1: Given a genotype, AABbccDdEe, how many different types of gametes can it form. 
A. 3
B. 4
C. 5
D. 8

Q2: What are the different combinations of gametes formed by the above genotype

Solution and analysis on 

https://drive.google.com/file/d/0BzrbmUVc9aT3a0Uya0xzd0JVSmM/view?usp=sharing

GENETICS FOR CSIR-NET, GATE AND MSc ENTRANCE

 Genetics: Problems, Solution and Analysis-I

Dr CharuSudan

Q1: What are the different pairing possibilities in an autotetraploid during meiosis

A. Two bivalents

B. one quadrivalent                                             

C. One univalent+ One trivalent                                      

D. All the above

Q2: Which of the above pairings can lead to production of diploid gametes?

1. Only A        2. B and C       3. A and C       4. A and B

Solution at: 

https://drive.google.com/file/d/0BzrbmUVc9aT3RWFBUWd2elNGM2c/view?usp=sharing