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Published on: 13/05/2022
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latest Book back QuestionsDownload Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
Due to incomplete linkage in maize, the ratio of parental and recombinants are ______.
50:50
7:1:1:7
96.4: 3.6
1:7:7:1
2.
Accurate mapping of genes can be done by three point test cross because increases _____.
Possibility of single cross over
Possibility of double cross over
Possibility of multiple cross over
Possibility of recombination frequency
3.
Which of the following sentences are correct?
1. The offspring exhibit only parental combinations due to incomplete linkage
2. The linked genes exhibit some crossing over in complete linkage
3. The separation of two linked genes are possible in incomplete linkage
4. Crossing over is absent in complete linkage
1 and 2
2 and 3
3 and 4
1 and 4
4.
The A and B genes are 10 cm apart on a chromosome. If an AB/ab heterozygote is testcrossed to ab/ab, how many of each progeny class would you expect out of 100 total progeny?
25 AB, 25 ab, 25 Ab, 25 aB
10 AB, 10 ab
45 AB, 45 ab
45 AB, 45 ab, 5 Ab, 5aB
5.
An allohexaploidy contains ______.
Six different genomes
Six copies of three different genomes
Two copies of three different genomes
Six copies of one genome
1.
(b)
7:1:1:7
2.
(d)
Possibility of recombination frequency
3.
(c)
3 and 4
4.
(d)
45 AB, 45 ab, 5 Ab, 5aB
5.
(c)
Two copies of three different genomes
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Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
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Maths
Chemistry
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Computer Technology
History
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