1. Complete the following sentences by choosing the appropriate bracket words. (Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene)
a) Hereditary characters are transferred from parents to offspring by............, hence they are said to be structural and functional units of heredity.
b) Organisms produced by ............ show minor variations.
c) The component which is in the nuclei of cells and carries the hereditary characteristics is called .............
d) Chromosomes are mainly made up of .............
e) Organisms produced through ............ show major variations.
2. Choose the correct alternative and write it along with its allotted alphabet
A. Information necessary for -------------------- synthesis in the cell is stored in
a. DNA
b. Protein
c. Glucose
d. Fat
e. minerals
B. The structure in the nucleus of cells that carries the hereditary characteristics is called the ---------------
a. genome
b. chromosome
c. mitochondria
d. nucleolus
C. ---------------- discovered DNA while studying the white blood cells.
a. Watson, Crick
b. Fredrick Miescher
c. Alexander Fleming
d. Gregor Mendel
D. The RNA molecule which, according to the message of the mRNA carries the amino acid up to the ribosomes is called.
a. Messenger RNA
b. Ribosomal RNA
c. Transfer RNA
d. All the above
3. State whether the following statements are True or False
a) Wrinkled seed is the dominant character.
b) a Monohybrid ratio, the phenotypic ratio is 9:3:3:1
c) The centromere is exactly at the midpoint in sub-metacentric chromosome.
d) Segments of RNA molecule are called genes.
e) The tRNA molecule carries the information of protein synthesis from genes.
f) The Albinism, the body cannot produce glutamic acid.
4. Explain following.
a) Explain Mendel’s monohybrid progeny with the help of any one cross.
b) Is it right to avoid living with a person suffering from a genetic disorder?
5. Answers the following questions in your own words.
a) What is meant by ‘chromosome’? Explain its types.
b) Describe the structure of the DNA molecule.
c) Explain the structure, function, and types of RNA.
6. Write a brief note on each.
a) Monogenic disorders
b) Sickle cell anemia: symptoms and treatment.
7. Activity: Prepare a model of the DNA and give a presentation based on it.