GATE XL topic:genetics-genomics PYQs & Answers — Page 3

Questions 21–30 of 33. Imported answers require independent review unless marked reviewed.

A double homozygous mutant develops green and wrinkled seeds. When it was crossed with a true-breeding plant having yellow and round seeds, all the F1 plants developed yellow and round seeds. After self-fertilization of F1, the calculated percentage probability of plants with green and wrinkled seeds in the F2 population (round off to 2 decimal places) is ________

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If a species has 2n = 16 chromosomes, the number of chromosomes per cell in a double monosomic individual would be

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Plant weight is determined by a pair of alleles at each of the two independently assorting loci (A and Bb) that are additive and equal in their effects. The recessive alleles do not contribute towards plant weight. Plants with genotype aa bb are 1 g in weight, whereas plants with genotype AA BB weigh 3.4 g. Plant with genotype aa bb is crossed with a plant of genotype AA BB. The weight (in g, round off to one decimal place) of an individual plant in F₁ progeny of this cross would be

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A cell in G₁ of Interphase has 12 chromosomes. In Anaphase-I of meiosis, the number of DNA molecules per cell will be

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The genes for microRNA (miRNA) in plants are usually transcribed by

Your answerChoose one option.

RNA polymerase I

RNA polymerase II

RNA polymerase III

RNA polymerase IV

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Which of the statements is TRUE for transpos[e] elements Ac and Ds?

Your answerChoose one option.

Both Ac and Ds are autonomous because they encode their own transposase

Both Ac and Ds are non-autonomous because they do not encode their own transposase

Only Ac is autonomous because it encodes its own transposase

Only Ds is autonomous because it encodes its own transposase

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The coding sequence of a gene XLR18 has the single ORF of 783 bp. The approximate molecular weight of the XLR18 protein in kDa is _____.

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Statements given below are either TRUE (T) or FALSE (F). Select the CORRECT combination.

P. Mitosis occurs exclusively in diploid mother cell Q. Mitosis occurs both in diploid and haploid mother cells R. Meiosis occurs exclusively in diploid mother cell S. Meiosis occurs both in diploid and haploid mother cells

Your answerChoose one option.

P-T, Q-F, R-T, S-F

P-F, Q-T, R-F, S-T

P-T, Q-F, R-F, S-T

P-F, Q-T, R-T, S-F

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In garden pea, dwarf plants with terminal flowers are recessive to tall plants with axial flowers. A true-breeding tall plant with axial flowers was crossed with a true-breeding dwarf plant with terminal flowers. The resulting F₁ plants were testcrossed, and the following progeny were obtained:

Tall plants with axial flowers = 320 Dwarf plants with terminal flowers = 318 Tall plants with terminal flowers = 79 Dwarf plants with axial flowers = 83

The map distance between the genes for plant height and flower position is_____cM.

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Two true-breeding snapdragon (Antirrhinum majus) plants, one with red flowers and another with white flowers were crossed. The F₁ plants were all with pink flowers. When the F₁ plants were selfed, they produced three kinds of F₂ plants with red, pink and white flowers in a 1:2:1 ratio. The probability that out of the five plants picked up randomly, two would be with pink flowers, two with white flowers and one with red flowers is ____%.

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GATE XL topic:genetics-genomics PYQs

Question 20

Question 10

Question 19

Question 20

Question 2

Question 3

Question 10

Question 11

Question 19

Question 20