Which of the following genotype express gametes? 

(1) TtRrAa

(2) TtRA

(3) ATRr

(4) NMLr

Subtopic:  Dihybrid Cross Analysis |
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A cross between tall and dwarf plant was performed and 120 offspring were produced in which 90 plants were tall and 30 were dwarf. Find out the genotype of their parents. 

(1) Tt and TT

(2) Tt and Tt

(3) TT and tt

(4) tt and tt

Subtopic:  Monohybrid Cross: 1 |
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A cross between tall pea plant and its recessive parent is known as 

(1) Back cross

(2) Test cross

(3) Recessive cross

(4) Dominant cross

Subtopic:  Monohybrid Cross: Further Understanding |
 93%
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What will be the genotype of parental plants if they produced 25 AA : 48 Aa : 26 aa 

(1) AA and AA

(2) AA and aa

(3) Aa and Aa

(4) aa and aa

Subtopic:  Monohybrid Cross: Further Understanding |
 85%
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Which of the following was not explainedby the Mendel’s law of dominance? 

(1) Characters are controlled by discrete units called factors.

(2) Factors occur in pairs.

(3) Every factor has alternate forms known as alleles

(4) In a dissimilar pair of factors one member of the pair dominatesthe other.

Subtopic:  Dominance Deviation from Mendel: 1 |
 65%
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Who was the first to use statistical analysis and mathematical logics for solving biological problems? 

(1) Francis crick

(2) Gregor Mendel

(3) Hugo de vries

(4) W. Bateson

Subtopic:  Introduction to Genetics: 1 |
 98%
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If F2 dwarf plants were self-pollinated then the genotype of F3 & F4 plants is 

(1) TT and Tt

(2) tt and tt

(3) tt and Tt

(4) Tt and Tt

Subtopic:  Monohybrid Cross: 1 |
 76%
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Technique(s) used by Mendel for his hybridisation experiments

(1) Emasculation

(2) Bagging

(3) Artificial hybridisation

(4) All of the above

Subtopic:  Introduction to Genetics: 1 |
 91%
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Trait expressed in F1 generation is 

(1) Parental

(2) Recessive

(3) Dominant

(4) Recombinant

Subtopic:  Monohybrid Cross: 1 |
 80%
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In a true breeding tall or dwarf pea variety the possible set of allelic pair(s) of genes for height are

(1) TT, Tt, tt

(2) TT, tt

(3) TT

(4) tt

Subtopic:  Monohybrid Cross: 1 |
 56%
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