Genetics And Plant Breeding - Study Mode

[#546] The process due to which allopolyploids behave like diploid only in bivalent formation is
Correct Answer

(C) Diploidization

Explanation

Solution: The process due to which allopolyploids behave like diploids only in bivalent formation is Diploidization. Diploidization is the process of converting a polyploid genome back into a diploid one. It involves many changes in genome organization that ultimately restore bivalent chromosome pairing and disomic inheritance, and resolve dosage and other issues caused by genome duplication.

[#547] Tiger project is a holistic approach for the conservation of
Correct Answer

(B) Tiger

Explanation

Solution: Tiger project is a holistic approach to the conservation of Tigers. Project Tiger is a tiger conservation programme launched in April 1973 by the Government of India during Prime Minister Indira Gandhi's tenure. The project aims at ensuring a viable population of the Bengal tiger in its natural habitats, protecting it from extinction, and preserving areas of biological importance as a natural heritage that represent the diversity of ecosystems across the tiger's range in the country. It ensures a viable tiger population for economic, scientific, cultural, aesthetic and ecological values.

[#548] The branch of science which deals with study of pollen is known as
Correct Answer

(D) Palynology

Explanation

Solution: The branch of science that deals with study of pollen are known as Palynology. Palynology is the study of plant pollen, spores and certain microscopic plankton organisms. The term is commonly used to refer to a subset of the discipline, which is defined as "the study of microscopic objects of macromolecular organic, not capable of dissolution in hydrochloric or hydrofluoric acids".

[#549] One gene influencing several traits is known as
Correct Answer

(A) Pleotropy

Explanation

Solution: One gene influencing several traits is known as Pleiotropy. “PLEIOTROPY” refers to the phenomenon in which a single locus affects two or more unrelated phenotypic traits and is often identified as a single mutation that affects two or more wild-type traits. It occurs when one gene influences two or more seemingly unrelated phenotypic traits. The underlying mechanism is genes that code for a product that is either used by various cells or has a cascade-like signaling function that affects various targets.

[#550] The phenotypic ratio of monohybrid cross in F 2 generation is
Correct Answer

(A) 3 : 1

Explanation

Solution: The phenotypic ratio of monohybrid cross in F 2 generation is 3 : 1. In the offspring of monohybrid crosses, or F 2 generation, Mendel repeatedly observed a phenotype ratio of three plants with the dominant phenotype to one plant with the recessive phenotype (3 : 1) in the F 2 generation.