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The gene interaction when one gene masks the effect

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When a gene pair hides the effect of another, the phenomenon is called

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Important Questions on Principles of Inheritance and Variation

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 17

What will be the ratio in F2 generation if red-flowered variety of Mirabilis jalapa is crossed with white-flowered variety  

Or

Phenotypic ratio in plant Snapdragon in F2 is

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 18
What would be the colour of flower in F1 progeny as a result of cross between homozygous red and homozygous white flowered Snapdragon :-
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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 19
9: 3: 3: 1 ratio is modified to 9: 7 ratio due to
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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 20
Incomplete dominance is found in :
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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 21
Complete dominance is absent in
Or
Incomplete dominance is shown by
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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 22
When an albino female plant of maize is crossed with normal green male plant, all plants in the progeny are albino because
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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 23
Kappa particles indicate
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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 24
Mirabilis jalapa is a good example of