Genetics And Plant Breeding - Study Mode

[#371] If Mendel had found the linkage genes in his studied traits he could not be able to formulate
Correct Answer

(B) Laws of independent assortment

Explanation

Solution: If Mendel had found the linkage genes in his studied traits he could not be able to formulate the Laws of independent assortment. Genetic linkage is the tendency of DNA sequences that are close together on a chromosome to be inherited together during the meiosis phase of sexual reproduction. It is the most prominent exception to Gregor Mendel's Law of Independent Assortment. Gregor Mendel's Law of Independent Assortment states that every trait is inherited independently of every other trait.

[#372] A pure tall plant was grown in nutrient limited soil and became dwarf. If this plant was selfed then the genotype in the F 1 generation are
Correct Answer

(C) All tall plants

Explanation

Solution: A pure tall plant was grown in nutrient-limited soil and became a dwarf. If this plant was selfed then the genotype in the F 1 generation are all tall plants. A pure tall plant has genes TT, whereas in limitation of nutrients its phenotype is affected. If the plants with dominant and pure genes (TT) are selfed then all tall plants will only be developed as there is the absence of any dwarf or recessive genes.

[#373] Inbreeding of cross-pollinated species leads to increase in
Correct Answer

(B) Homozygosity

Explanation

Solution: Inbreeding of cross-pollinated species leads to an increase in Homozygosity. Homozygosity is the case where similar or identical alleles combine to express a trait that is not otherwise expressed (recessiveness). Inbreeding exposes recessive alleles through increasing homozygosity. Inbreeding is the production of offspring from the mating or breeding of individuals or organisms that are closely related genetically.

[#374] Interveinal chlorosis is caused by the deficiency of
Correct Answer

(D) Magnesium

Explanation

Solution: Interveinal chlorosis is caused by the deficiency of Magnesium. Interveinal Chlorosis is a yellowing of the tissue between the veins of a leaf due to the decline of chlorophyll production and activity. Magnesium (Mg) is needed by all crops to help capture the sun's energy for growth and production through photosynthesis. It also helps to activate specific enzyme systems.

[#375] Plant Variety Act was formulated in
Correct Answer

(D) 1993

Explanation

Solution: The plant Variety Act was formulated in 1993. A new variety shall be registered under this Act if it conforms to the criteria of novelty, distinctiveness, uniformity and stability. Plant Breeder's Rights are used to protect new varieties of plants by giving exclusive commercial rights for 20 years (25 years for trees or vines) to market a new variety or its reproductive material.