Genetics And Plant Breeding MCQ Question and Answer | Agriculture MCQ Question

The cell of embryosac which releases one chemical to guide the movement of pollen towards the ovule is Synergids.
Synergid cells are two specialized cells that lie adjacent to the egg cell in the female gametophyte of angiosperms and play an essential role in pollen tube guidance and function.
Defensin-like polypeptide LUREs are pollen tube attractants secreted from synergid cells.

Ganga-4 is a Double cross hybrid.
It is a cross-product of CM 400 × CM 300 × CM 602.
Matures in 100 - 105 days. Plants have medium-thick stems with long narrow green leaves.
This cultivar also possesses moderate resistance to downey mildew, leaf blight, rust stem borer and lodging. Suitable for all maize growing areas.

W. C. Rontgen discovered X-rays first.
W. C. Rontgen reported the discovery of X-rays in December 1895 after seven weeks of assiduous work during which he had studied the properties of this new type of radiation able to go through screens of notable thickness. He named them X-rays to underline the fact that their nature was unknown.
X-radiation is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3 × 10¹⁶ Hz to 3 × 10¹⁹ Hz) and energies in the range 145 eV to 124 keV.

When the composite sample is reduced to required size it is to be submitted to seed testing lab is Submitted sample.
The composite sample is formed by combining and mixing all the primary samples taken from the lot or container or bag.
Submitted sample is a sample submitted to the testing station.

A Group of plants with similar characteristics of any rank is termed a taxon.
A taxon is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit.
A taxonomic unit, whether named or not: i.e. a population, or group of populations of organisms that are usually inferred to be phylogenetically related and which have characters in common that differentiate.

The F₁ ratio of a backcross in a monohybrid cross is 1 : 1.
The mating of a hybrid organism (offspring of genetically unlike parents) with one of its parents or with an organism genetically similar to the parent is known as a Back cross.
The backcross is useful in genetics studies for isolating (separating) certain characteristics in a related group of animals or plants.

The total of deleterious genes present in species is known as Genetic load.
A genetic alteration that increases an individual's susceptibility or predisposition to a certain disease or disorder is known as a deleterious gene.
Deleterious mutation load is the main contributing factor to genetic load overall. Load depends only on the deleterious mutation rate and not on the selection coefficient.

Bread wheat is Auto-allopolyploid.
Autoallopolyploid, is having one set of chromosomes (or one genome) in a more than diploid state.
Bread Wheat (Decaploid triticale) (AABBDDRRRR) is an example of auto-allopolyploidy. This plant has two copies of each of the three genomes of bread wheat (ABD) and four copies of that of rye genome (R). Thus the rye genome is in autotetraploid condition.

The longest phase in the cell cycle prophase, from the given options.
The first and longest phase of mitosis is prophase. During prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surrounding the nucleus) breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles of the cell.

D-genome of common cultivated wheat has been contributed by Ae squarosa.
The D genome of allohexaploid bread wheat (Triticum aestivum, 2n = AABBDD) is the least diverse of the three wheat genomes and is unarguably less diverse than that of diploid progenitor Aegilops tauschii (2n = DD).
Aegilops tauschii (synonyms Aegilops squarrosa, Triticum tauschii), is a wild goatgrass that was one of the parent species of bread wheat.