Genetics And Plant Breeding - Study Mode

[#566] Father of Genetic Engineering is
Correct Answer

(B) Paul Berg

Explanation

Solution: The Father of Genetic Engineering is Paul Berg. In 1972, Paul Berg started genetic engineering. He succeeded in inserting DNA from a bacterium into the virus' DNA. Berg thereby created the first DNA molecule made of parts from different organisms. This type of molecule became known as hybrid DNA or recombinant DNA. He hypothesized that cells turned cancerous because of some unknown interaction between genes and cellular biochemistry.

[#567] The abnormal increase in number of cells is known as
Correct Answer

(A) Hyperplasia

Explanation

Solution: The abnormal increase in the number of cells is known as Hyperplasia. Hyperplasia is an enlargement of an organ or tissue caused by an increase in the amount of organic tissue that results from cell proliferation. It may lead to the gross enlargement of an organ, and the term is sometimes confused with benign neoplasia or benign tumor. In hyperplasia, there is an increase in the number of cells in an organ or tissue that appear normal under a microscope.

[#568] The development of seedwithout sexual process is
Correct Answer

(B) Apomixis

Explanation

Solution: The development of seed without a sexual process is Apomixis. Apomixis (asexual seed formation) is the result of a plant gaining the ability to bypass the most fundamental aspects of sexual reproduction: meiosis and fertilization. Without the need for male fertilization, the resulting seed germinates a plant that develops as a maternal clone.

[#569] Heterosis over standard commercial variety is
Correct Answer

(D) Economic heterosis

Explanation

Solution: Heterosis over standard commercial variety is Economic heterosis. Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents. Economic heterosis is the only estimate of heterosis, which is of commercial or practical value in 1944. Powers suggested that, the term heterosis should be used only when the hybrid is either superior or inferior to both parents.

[#570] During Transcription, rRNA
Correct Answer

(C) Plays catalytic role

Explanation

Solution: During Transcription, rRNA plays a catalytic role. Transcription is the first step in decoding a cell's genetic information. During transcription, enzymes called RNA polymerases build RNA molecules that are complementary to a portion of one strand of the DNA double helix. rRNAs combine with proteins and enzymes in the cytoplasm to form ribosomes, which act as the site of protein synthesis. These complex structures travel along the mRNA molecule during translation and facilitate the assembly of amino acids to form a polypeptide chain.