NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 85

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$F_{2}$ generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as $1 : 2 : 1$ . It represents a case of

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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 86

Blue flowered and white flowered plant on crossing gave progeny of blue and white flowered in the ratio of

60 : 40

. What ratio of blue and white is expected if the blue flowered are self pollinated

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 87

Pure homozygous offsprings in a dihybrid cross in the F₂ generation will be

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 88

Hybrid vigour is induced by

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 89

When two genetic loci produce identical phenotypes in cis as well as in trans position, they are considered to be

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 90

If in a garden pea plant, a cross is made between red flowered and white flowered plants. What will be the phenotypic ratio in

F_{2}

generation?

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 91

Test cross of dihybrid ratio is

1 : 1 : 1 : 1

. It proves that

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 92

Mendel's Principle of segregation means that the gamete cells always receive :-

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NTA Errorless Biology Volume-2>Chapter 5 - Principles of Inheritance and Variation>Ordinary Thinking>Q 93

Mendel crossed a pure white-flowered recessive pea plant with a dominant pure red-flowered plant. The first generation of hybrids from the cross should show