Genetics And Plant Breeding - Study Mode
[#731] The unit of inheritance is
Correct Answer
(C) Gene
Explanation
Solution: The unit of inheritance is a gene. A gene is the basic physical and functional unit of heredity. The Mendelian gene is a basic unit of heredity and the molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins.
[#732] Allosomes are
Correct Answer
(C) Sex chromosomes
Explanation
Solution: Allosomes are Sex chromosomes. Allosome is a chromosome that differs from an ordinary autosome in form, size, and behavior. The human sex chromosomes, a typical pair of mammal allosomes, determine the sex of an individual created in sexual reproduction. Nettie Stevens and Edmund Beecher Wilson both independently discovered sex chromosomes in 1905.
[#733] A membrane which allows selective movement of molecules through it is own as?
Correct Answer
(A) Semipermeable membrane
Explanation
Solution: A membrane that allows selective movement of molecules through it is own a Semipermeable membrane. It is a type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by osmosis. The rate of passage depends on the pressure, concentration, and temperature of the molecules or solutes on either side, as well as the permeability of the membrane to each solute. Biological membranes are selectively permeable, with the passage of molecules controlled by facilitated diffusion, passive transport or active transport regulated by proteins embedded in the membrane.
[#734] Centrioles generally have microfibrils
Correct Answer
(C) 9
Explanation
Solution: Centrioles generally have 9 microfibrils. The centriole is a cylindrical organelle composed mainly of a protein called tubulin. It is made up of nine sets of short microtubule triplets, arranged in a cylinder. Centrioles are involved in the organization of the mitotic spindle and the completion of cytokinesis.
[#735] The term DNA Finger-printing was coined by
Correct Answer
(C) A. Jeffrey
Explanation
Solution: The term DNA Fingerprinting was coined by A. Jeffrey. Alec John Jeffreys created a process called DNA fingerprinting in the UK during the twentieth century. For DNA fingerprinting, technicians identify a person as the source of a biological sample by comparing the genetic information contained in the person's DNA to the DNA contained in the sample.