Which of the following is the main category of mutation?
Somatic mutation
Genetic mutation
Zygotic mutation
All of these
DNA elements, which can switch their position, are called
exons
introns
cistrons
transposons
The process of replication in plasmid DNA, other than initiation, is controlled by:
mitochondrial gene
bacterial gene
plasmid gene
Protein synthesis in an animal cell takes place
only in the cytoplasm
in the nucleolus as well as in the cytoplasm
in the cytoplasm as well as in mitochondria
only on ribosomes attached to a nucleus
Two linked genes a and b show 20% recombination. The individuals of dihybrid cross between ++/++ x ab/ab shall show gametes
++80 : ab : 20
++50 : ab : 50
++40 : ab : 40 : a 10 : + b : 10
++30 : ab : 230 : + a 20 : + b : 20
E. coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation shall be correct?
Both the strands of DNA will be radioactive
One strand radioactive
Each strand half radioactive
None is radioactive
The organism in which the two alleles of a gene are the same is called:
Homozygous
Heterozygous
Phenotype
Homologous chromosome
Ratio of complementary genes is:
9 : 3 : 4
12 : 3 : 1
9 : 3 : 3 : 4
9 : 7
In his experiment, Mendel obtained wrinkled pea. The wrinkling was due to deposition of sugar instead of starch. This happened due to the enzyme:
amylase
invertase
diastase
absence of starch-branching enzyme
Sex is determined by a pair of sex chromosomes called:
Autosomes
Chromosomes
Sex-linked genes
