Genetics And Plant Breeding - Study Mode
[#391] Pearlmillet is predominantly cross pollinated because it is
Correct Answer
(B) Protogynous
Explanation
Solution: Pearl millet is predominantly cross-pollinated because it is Protogynous. Pearl millet is a protogynous species. This pattern involves individuals developing initially as immature females, then typically as mature females before later potentially changing sex to become a mature males. The styles start protruding two to three days after the emergence of the panicle. The stylar branches protrude first from the florets in the upper middle region of the panicle and then proceed both up and downwards. It is allogamous and landraces are highly heterogeneous. Stigma emergence precedes anther emergence, resulting in high cross-pollination due to wind.
[#392] Chlorosis in nitrogen deficient plants appears
Correct Answer
(D) First in the mature leaves and then in the young leaves
Explanation
Solution: Chlorosis in nitrogen-deficient plants appears first in the mature leaves and then in the young leaves. Nitrogen-deficient plants have stunted growth and reduced yield. In many crops nitrogen-related chlorosis begins from the old lower leaves, the leaf tip and midrib turn yellow but the leaf edges stay green. As deficiency persists yellowing progresses to the upper leaves and leaf necrosis (dying of leaf tissue) occurs.
[#393] Who produced puppies through artificial insemination in dogs
Correct Answer
(C) Spallanzani
Explanation
Solution: Spallanzani produced puppies through artificial insemination in dogs. In Artificial Insemination (AI) the semen is collected manually from a stud male and thereafter deposited (inseminated) in the female so that fertilization can occur in the absence of natural mating. This first AI was performed by Lazzaro Spallanzani in 1780 by inseminating a bitch which later gave birth to three pups. He is also called as “Father of modern artificial insemination”.
[#394] Site of protein synthesis in a cell is
Correct Answer
(A) Ribosomes
Explanation
Solution: The site of protein synthesis in a cell is the Ribosomes. Ribosomes are the sites in a cell in which protein synthesis takes place. Cells have many ribosomes, and the exact number depends on how active a particular cell is in synthesizing proteins. Proteins by translating the genetic code transcribed in mRNA into an amino acid sequence.
[#395] Who is known as father of genetics
Correct Answer
(A) Mendel
Explanation
Solution: Mendel is known as the father of genetics. Mendel, known as the "Father of modern genetics", chose to study variation in plants in his monastery's 2 hectares experimental garden. His experiments led him to make two generalizations, the Law of Segregation and the Law of Independent Assortment, which later came to be known as Mendel's Laws of Inheritance.