A. Excretion
B. Circulation
C. Reproduction
D. Pollution
Biology
Tjio and Levan’s contribution is very significant because they ………. ?
A. Identified barr bodies
B. Detected sex linkage
C. Pointed out mutational changes
D. Gave the number of human chromosomes
Genetic information are carried in the form of long chain of molecules made-up-of ………?
A Amino acids
B. RNA
C. Nucleotides
D. Polypeptides
A cistron is ……..?
A. Structural of gene
B. Functional unit of RNA
C. Functional unit gene
D. Replication unit of gene
Balbiani discovered special type of chromosome from the salivary gland of chironomus larva which are recognized by the presence of ……..?
A. Bands
B. Loops
C. Both bands and loops
D All of the above
If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have………..?
A. 40 chromosomes
B. 20 chromosomes
C. 10 chromosomes
D. While some other will have 20
How many nucleosomes are found in helical coil of 30 nm chromatin fibre ….?
A. 10
B. 12
C. 06
D. 09
The frequency of a character is found to be increasing when ……….?
A. It is dominant
B. It is recessive
C. It is adaptable
D. It is inheritable
The character which appears physically in an animal is ……….?
A. Genotype
B. Phenotype
C. Heterotype
D. Morphozygous
The haploid condition is found in ………?
A. Amoeba
B. Bacteria
C. Ovum
D. Zygote