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.
Genetic code consists of
Adenine and guanine
Cytosine and uracil
Cytosine and guanine
All of the above
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
Maximum number of bases in plasmids discovered so far is:
50 kilo base
1500 kilo base
5000 kilo base
5 kilo base
The process of replication in plasmid DNA, other than initiation, is controlled by:
mitochondrial gene
bacterial gene
plasmid gene
Diploid chromosome number in humans is
46
44
48
42
Mutation used in agriculture are commonly
Induced
Spontaneous
Lethal
Recessive and lethal
Genes that are involved in turning on or off the transcription of a set of structural genes are called
polymorphic genes
operator genes
reductant genes
regulatory genes
Gene and cistron words are sometimes used synonymously because:
one cistron contains many genes
one gene contains many cistrons
one gene contains one cistron
one gene contains no cistron
In DNA when AGCT occurs, their association is as per which of the following pair?
AC-GT
AG-CT
AT-GC
All of these
