Introduction to Genetics Part - 2 | Previous year paper's Questions of Genetics in the CSIR-NET Exam

In this video, we are going to discuss the previous year's questions of Genetics in the CSIR Exam. Question practice for all candidates who are preparing for this exam.
Previous year questions CSIR Genetics

Q. How many genetically different gametes can be made by an individual of genotype AaBbccDDEe, assuming they are independently assorting? (June 2012)

1. Three
2. Five
3. Eight
4. 32

Q. In summer squash, white colour fruit (W) is dominant over yellow colour (w) and disc-shaped phenotype (D) is dominant over sphere-shaped phenotype (d). Determine the genotype of the parents if the cross between white, sphere crossed with white, sphere gives ¾ white, sphere and ¼ yellow, sphere. (Dec 2019)
1. WWDD × wwdd
2. Wwdd × Wwdd
3. WwDd × wwdd
4. wwDD × WWdd

Q. Two near inbred parental lines P1 and P2 of an angiosperm species are crossed to produce F1 seeds in which, the ploidy of the endosperm in 6N. If plants generated from these F1 seeds are backcrossed with P1, what will be the ploidy of the somatic cells in the next generation? (June 2018)
1. 2N
2. 4N
3. 5N
4. 6N

Q. Assuming that the A, B, C and D genes are not linked, the probability of a progeny being AaBBccDd from a cross between AABbccDd and aaBBccDD parents will be (June 2019)
1. 4/32
2. 3/16
3. 1/4
4. 3/32

Q. A phenotypically normal fruit fly was crossed to another fly whose phenotype was not recorded. Of the progeny, 3/8 were wild type, 3/8 had ebony body color, 1/8 had vestigial wings and 1/8 had ebony body color and vestigial wings. Ebony body color and vestigeal wings are recessive characters and their genes are located on two different autosomes. Based on this information which one of the following is the likely genotype of the parents? (June 2017)

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