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Published on: 05/11/2020
12th Standard Botany - Classical Genetics English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download 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.
The 1 : 2 : 1 ratio of co-dominance process Mendel's ___________
Law of dominance
Law of recessiveness
Law of segregation
Law of independent assortment
2.
Result of incomplete dominance is __________
Intermediate genotype
Intermediate phenotype
Recessive phenotype
Epistasis
3.
Identify the mismatched pair
Chloroplast inheritance - Gregor Mendel
Polygenic inheritance - H. Nilsson
Lethal genes - E. Baur
Incomplete dominance - Carl Correns
4.
Assertion (A): Codominance is an example of intragenic interaction
Reason (R): Interaction takes place between the alleles of the same gene
A and R are correct R explains A
A and R are incorrect
A is correct R is incorrect
A is incorrect R is correct
5.
Gregor Mendel ___________
(i) was born in Czechoslovakia
(ii) did his experiments in Pisum fulvum
(iii) was the first systemic researcher in genetics
(iv) Published his results in the paper "Experiments on Plant Hybrids"
All are correct
(ii), (iii), (iv) are correct
(i), (iii),(iv) are correct
(i), (iii), (iv) are correct
6.
In a test cross involving F1 dihybrid flies, more parental type offspring were produced than the recombination type offspring. This indicates ______.
The two genes are located on two different chromosomes
Chromosomes failed to separate during meiosis
The two genes are linked and present on the some chromosome
Both of the characters are controlled by more than one gene
7.
In his classic experiments on Pea plants, Mendel did not use ______.
Flowering position
Seed colour
Pod length
Seed shape
8.
The genotype of a plant showing the dominant phenotype can be determined by _____.
Back cross
Test cross
Dihybrid cross
Pedigree analysis
9.
Test cross involves ____.
Crossing between two genotypes with recessive trait
Crossing between two F1 hybrids
Crossing the F1 hybrid with a double recessive genotype
Crossing between two genotypes with dominant trait
10.
In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype _____.
aaBB
AaBB
AABB
aabb
1.
(b)
Law of recessiveness
2.
(b)
Intermediate phenotype
3.
(a)
Chloroplast inheritance - Gregor Mendel
4.
(a)
A and R are correct R explains A
5.
(c)
(i), (iii),(iv) are correct
6.
(c)
The two genes are linked and present on the some chromosome
7.
(c)
Pod length
8.
(b)
Test cross
9.
(c)
Crossing the F1 hybrid with a double recessive genotype
10.
(d)
aabb
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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
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
French
Tamilnadu Stateboard Standards
