Genetics And Plant Breeding - Study Mode

[#561] First man made cereal is
Correct Answer

(A) Triticale

Explanation

Solution: The first man-made cereal is Triticale. Triticale is a hybrid of wheat ( Triticum ) and rye ( Secale ) first bred in laboratories during the late 19 th century in Scotland and Germany. Triticale is almost always a second-generation hybrid, i.e., a cross between two kinds of primary (first-cross) triticales. When crossing wheat and rye, wheat is used as the female parent and rye as the male parent (pollen donor).

[#562] DNA replication in eukaryotes is
Correct Answer

(A) Semiconservative

Explanation

Solution: DNA replication in eukaryotes is Semiconservative. For most eukaryotes and prokaryotes, the process of DNA synthesis is done semiconservatively. The daughter copies each contain one strand from the parental duplex DNA and one nascent antiparallel strand. This mechanism is conserved from prokaryotes to eukaryotes and is known as semiconservative DNA replication.

[#563] Match the following columns: Column I Column II a. Synthesis of IAA 1. Magnesium b. Exanthema 2. Molybdenum c. Anthocyanin 3. Sulphur d. Nitrogen fixation 4. Copper 5. Zinc
Correct Answer

(C) a-5, b-4, c-1, d-2

Explanation

Solution: a. Synthesis of IAA includes Zinc. Zinc is an important essential micronutrient. Zinc is required for the activity of carbonic anhydrase, and auxin biosynthesis. b. Exanthema disease is a deficiency symptom of copper in the plant, produced by soil factors and brought about by soil microorganisms, as they attack the roots and produce harmful substances. c. Anthocyanin and Magnesium. Magnesium treatment caused a significant increase in anthocyanin concentration in all plants, with a stronger effect under elevated temperature regimes. d. Nitrogen Fixation includes Molybdenum. The molybdenum nitrogenase is responsible for most biological nitrogen fixation, a prokaryotic metabolic process that determines the global biogeochemical cycles of nitrogen and carbon.

[#564] Seed which do not absorb water is called
Correct Answer

(A) Hard seed

Explanation

Solution: The seed that does not absorb water is called a Hard seed. Hard seed means agricultural seed that would remain hard throughout a germination analysis conducted according to this chapter because the seed would not absorb water due to an impermeable seed coat. Seed in which the testa is unusually hard and impervious to moisture and which is therefore slow in germinating unless treated mechanically or chemically.

[#565] Gene for gene hypothesis is proposed by
Correct Answer

(C) Flor

Explanation

Solution: Gene for gene hypothesis is proposed by Harold Flor. The gene-for-gene hypothesis proposed by Harold Flor, based on his pioneering work on flax and the flax rust fungus Melampsora lini, states that for every dominant avirulence (Avr) gene in the pathogen. The gene-for-gene hypothesis states that for each gene controlling resistance in the host, there is a corresponding, specific gene controlling avirulence in the pathogen.