GATE XL topic:genetics-genomics PYQs & Answers — Page 4

Questions 31–33 of 33. Imported answers require independent review unless marked reviewed.

Among the following, which genetic material is naturally inherited through maternal inheritance in higher plants?

Your answerChoose one option.

Nuclear DNA

Plasmid DNA

Chloroplast DNA

T-DNA

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Two independent non-segregating recessive mutants (m1 and m2) display similar defects in petal formation. When they were crossed with each other (m1 × m2), all the F1 plants developed normal petals. In view of this observation, which of the following conclusions is CORRECT?

Your answerChoose one option.

Mutations in both m1 and m2 are in the same gene

Mutations in both m1 and m2 are in two separate genes

Inheritance is non-Mendelian

None of the above

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In a hypothetical trihybrid cross of three loci (viz. A, B, C), all were inherited in a complete dominant manner over their recessive alleles a, b, c, respectively. When a test cross between F1 and parent ‘aabbcc’ was performed, following genotypes of eight phenotypically distinct classes were observed with respective numbers

Class	Genotype	Number
1	ABC	412
2	abc	406
3	Abc	85
4	aBC	80
5	ABc	08
6	abC	07
7	AbC	01
8	aBc	01

The genetic distance (up to one decimal) between A and C loci will be ________ cM.

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GATE XL topic:genetics-genomics PYQs

Question 38

Question 48

Question 49