Agriculture · all questions

Genetics And Plant Breeding
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Q821

The location of various genes on a chromosome relative to specific microscopically visible landmark on the chromosome is called

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Q822

In gametophytic system of self-incompatibility, fully compatible will result from a cross between

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Q823

Consider the following statements
In pedigree method of breeding
1. plant selection is continued till the progenies become homozygous.
2. plants are selected from F₂ on words and their progenies are tested.
3. it may be possible to study precise nature of inheritance of different characters by studying the pedigree records.
Which of the statements given above are correct?

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Q824

Who discovered the cell?

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Q825

Resistance exhibited by adult plants is referred to as

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Q826

Designated inseparable seeds for wheat is

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Q827

DNA can be formed by

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Q828

Leafy vegetables like palak, amaranth us, spinach, are

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Q829

In wheat, an interspecific cross between Triticum aestivum and T. durum is

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Q830

Consider the following events which are significant in the development of improved varieties/hybrids of plants
1. Morgan discovered genes on chromosomes.
2. Knight noted that male and female parents contributed equally to F₁-generation.
3. Correns and de Vries rediscovered Mendel's laws of heredity.
4. Tomato carrying flavour gene is introduced.
What is the correct chronological sequence of the above events?

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Q831

The 'pure line' theory was proposed by

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Q832

The C₄ -plants are more efficient than C₃ -plants because

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Q833

When chiasma frequency is 100%, the percentage of crossing over is

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Q834

A genophore is made up of

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Q835

Ovule is attached to the placenta with a slender stalk, known as

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Q836

If a female plant of genetic constitution AABB is crossed to a male plant of genetic constitution aabb and the F₁ is test crossed, the genetic constitution of the test crossed progenies will be

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Q837

Which hormone suppresses the growth of plant?

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Q838

The sources of male sterility include

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Q839

What happens in PS-II?

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Q840

Double top cross refers to

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