Ratio of complementary genes is:
9 : 3 : 4
12 : 3 : 1
9 : 3 : 3 : 4
9 : 7
'Signal hypothesis' for the biosynthesis of secretory type of proteins was proposed by:
Camillo Golgi
Blobel and Sabatini
Baltimore
Sheeler and Bianchi
Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be in albino?
100%
25%
50%
75%
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
Which of the following is related to genetic engineering?
Mutation
Plasmid
Plastid
Heterosis
The genotype for one gene affects the expression of another quite separate gene. This situation is called:
Epistasis
Melanin
Albino
All of these
During replication of DNA, its two strands separate. Each of these serves as a template for the formation of new strands. Such type of replication is called:
Non-conservative
Semi-conservative
Flexible
Conservative
Loss of an X-chromosome in a particular cell, during its development, results into
diploid individual
triploid individual
gynandromorphs
both (a) and (b)
The tendency of organisms to resemble their parents in all fundamental features is called:
Heredity
Genotype
Phenotype
Inheritance
A woman with two genes (one on each 'X' chromosome) for haemophilia and one gene for colourblindness on the 'X' chromosomes marries a normal man. How will the progeny be?
All sons and daughters haemophilic and colourblind
Haemophilic and colourblind daughters
50% haemophilic colourblind sons and 50% haemophilic sons
50% haemophilic daughters and 50% colourblind daughters.
