Genetics And Plant Breeding - Study Mode

[#466] Sex form in most cucurbits including melons is
Correct Answer

(B) Monoecious

Explanation

Solution: Sex form in most cucurbits including melons is Monoecious. Within the Cucurbitaceae family, most of its species develop unisexual female and male flowers. The majority of the cucurbits exhibit monoecious conditions. Andromonoecious form Muskmelon and some cultivars of watermelon produce both male and bisexual flowers in a plant.

[#467] Seeds which are source of breeder seeds and produced through mass selelction along with the progeny testing in a pureline variety is termed as
Correct Answer

(D) Basic seeds

Explanation

Solution: Seeds that are source of breeder seeds and produced through mass selection along with the progeny testing in a pure line variety are termed Basic seeds. Foundation seed, also known as basic seed, is the descendent of breeder seed and is produced under conditions that ensure maintaining genetic purity and identity. The progeny of breeder seed produced by recognized seed-producing agencies in the public and private sector, under supervision of seed certification agencies in such a way that its quality is maintained according to prescribed field ad seed standards. A white colour certificate is issued for foundation seeds by seed certification agencies.

[#468] In pedigree selection the selection is carried out in which generation?
Correct Answer

(A) F 2

Explanation

Solution: In pedigree selection, the selection is carried out in the F 2 generation. In the pedigree method, individual plants are selected from F 2 and their progenies are tested in subsequent generations. A record of the entire parent-offspring relationship is maintained and known as a pedigree record.

[#469] Plants absorb from the soil
Correct Answer

(A) Capillary water

Explanation

Solution: Plants absorb from the soil Capillary water. Soil capillary eater is the water that remains in the soil after gravitational water is drained out, that is subject to the laws of capillary movement, and that is in the form of a film around the soil grains. Capillary absorption is primarily the transport mechanism for water in the tiny pores in concrete due to surface interactions between the water and the pore wall.

[#470] The DNA replicating enzyme in bacteria
Correct Answer

(C) DNA Pol III

Explanation

Solution: The DNA replicating enzyme in bacteria is DNA Pol III. The DNA polymerase III holoenzyme is a complex, multi-subunit enzyme that is responsible for the synthesis of most of the Escherichia coli chromosome. DNA polymerase III holoenzymes (Pol III HE) is an enzyme that catalyzes the elongation of DNA chains during bacterial chromosomal DNA replication. Bacterial cells contain several distinct DNA polymerases.