Genetics And Plant Breeding - Study Mode

[#191] 90% of total photosynthesis in the world is carried out by
Correct Answer

(D) Algae

Explanation

Solution: 90% of total photosynthesis in the world is carried out by Algae. 90% of total photosynthesis is carried out by aquatic plants, chiefly algae. 10% of total photosynthesis is performed by land plants. Photosynthesis is the process by which higher plants, algae, and certain species of bacteria transform and store solar energy in the form of energy-rich organic molecules. It is the process by which organisms use sunlight to produce sugars for energy. Plants, algae and cyanobacteria all conduct oxygenic photosynthesis.

[#192] When the ovule is bent like a horseshoe, is known as
Correct Answer

(D) Camplylotropous

Explanation

Solution: When the ovule is bent like a horseshoe, is known as Campylotropous. campylotropous is a condition of Having the ovules and seeds so curved, or bent down upon themselves, that the ends of the embryo are brought close together. Campylotropous ovule is a curved ovule with the micropyle almost touching the funiculus. It is bent upon itself like a horseshoe but an embryo is straight.

[#193] The ratio of economic yield to the biological yield is
Correct Answer

(B) Harvest index

Explanation

Solution: The ratio of economic yield to biological yield is the Harvest index. Harvest index (HI) is the ratio of grain to total shoot dry matter and is a measure of reproductive efficiency. HI is determined by interactions between genotypes (G), environment (E) and crop management (M). Economic yield is the mass of desired product. The harvest index is calculated by dividing the dry mass of economic yield by the dry mass of biological yield.

[#194] The outbreeding individuals suffer from inbreeding depression when subjected to close mating. In which of the following types of mating, the inbreeding depression will be cute
Correct Answer

(A) Genetic assortative mating

Explanation

Solution: The outbreeding individuals suffer from inbreeding depression when subjected to close mating. In Genetic assortative mating, the inbreeding depression will be cute. Assertive mating is a mating pattern and a form of sexual selection in which individuals with similar phenotypes or genotypes mate with one another more frequently than would be expected under a random mating pattern.

[#195] The situation when dominant and recessive alleles are expressed itself together is known as
Correct Answer

(B) Codominance

Explanation

Solution: The situation when dominant and recessive alleles are expressed itself together is known as Codominance. Codominance refers to a type of inheritance in which two versions (alleles) of the same gene are expressed separately to yield different traits in an individual. An example of codominance is seen in the MN blood group system of humans.