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1. The word “Genetics” coined by _________.
A. Mendel
B. Johannsen
C. Bateson
D. Morgan
ANSWER:C.Bateson
SOLUTION :William Bateson (August 1861 – 8 February 1926) was an English geneticist. He was the first person to use the term genetics to describe the study of heredity and biological inheritance.
2. Which technique is used by Mendel for hybridization ?
A. Emasculation
B. Bagging
C. Protoplast fusion
D. Both 1 & 2
ANSWER:D.Both 1 & 2
SOLUTION:Mendel performed hybridization using the methods of emasculation and bagging.
3. Which is functional unit of inheritance _______.
A. Cistron
B. Intron
C. Chromosome
D. Gene
ANSWER : D.Gene
SOLUTION:A gene is the basic physical and functional unit of heredity. Genes are made up of DNA.
4. Genetic constitution of an individual is represented by __________.
A. Genome
B. Genotype
C.Phenotype
D. Karyotype
ANSWER: B.Genotype
SOLUTION: The genetic constitution of an individual is represented by its genotype, which is the unique combination of genes an individual has. Genotype includes the complete set of instructions for protein synthesis, body building and development, and body function. It also determines an individual’s hereditary potentials and limitations from embryonic formation through adulthood.
5. Genotype – phenotype concept was first produced by _________.
A. Bateson
B. Johannsen
C. Sutton & Boveri
D. Punnet
ANSWER:B.Johannsen
SOLUTION:Wilhelm Johannsen first studied heredity and proposed the difference between genotype and phenotype. According to Johannsen, the genotype of an organism is responsible for its phenotype through development and environmental effect.
6. With increasing age the linkage becomes ________.
A. Strong
B. Weak
C. Terminates
D. Remains unchanged
ANSWER: A.Strong
SOLUTION: To understand why the linkage becomes stronger with age, it is important to consider the factors that contribute to this phenomenon.
7. Which of the following is excption to Mendel’s laws ______.
A. Linkage
B. Incomplete dominance
C. Co – dominance
D. All of the above
ANSWER:D.All of the above
SOLUTION :
A cross between two Mirabilis jalapa also called four o’clock plants shows the common exception to Mendel’s principles.
8. Scientist who discovered cytoplasmic inheritance was ___________.
A. Correns
B. Rhoades
C. Mendel
D. Morgan
ANSWER: A.Correns
SOLUTION:Evidence for cytoplasmic inheritance was first reported by Correns in Mirabilis jalapa and by Bar in Pelargonium zonule in 1908. Rhoades described cytoplasmic male sterility in maize in 1933. So the scientist who first discovered the cytoplasmic inheritance is Correns.
9. Cytoplasmic male sterility is passed down______.
A. Through bacteriophages
B. Paternally
C. Maternally
D. Biparentally
ANSWER:C.Maternally
SOLUTION: Cytoplasmic male sterility (CMS) is a maternally inherited trait that causes dysfunctions in pollen and anther development. CMS is caused by the interaction between nuclear and mitochondrial genomes.
10. An example of the quantitative trait in man is ______.
A. Hair colour
B. Colour of eye
C. Skin colour
D. Shape of nose
ANSWER: C.Skin colour
SOLUTION:
Examples of quantitative traits include height, skin colour, weight and blood pressure.