184641
Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangement called?
1 Point mutation
2 Analog substitution
3 Frame shift mutation
4 Tautomerisational mutation
Explanation:
: Nomally DNA molecule has A-T, G-C pairing. However these base can exist in alternative walency status, owing to rearrangement is called Tautomerisational mutation. - A tautomeric shift in one strand has produced a transition mutation in the complementary strand. - A tautomeric shift is not itself a mutation but transient change to an altemative form of the molecule.
DUMET-2001
Principle of Inheritance and Variation
184655
Theory of 'saltations' was given by?
1 G Mendel
2 Hugo de Vries
3 JBS Haldane
4 H J Miller
Explanation:
: The saltation theory was given by Hugo de Vries. - Saltation is a type of sudden changellarge-scale nutational changes from one generation to the next generation and his potential of causing single-step speciation. - Accorting to Hugo de Vries, species are not formed by contimous variation but by a sudden appearance of variations, which was termed as mutation. This was known as the theory of saltations or mutation theory.
AIIMS-2011
Principle of Inheritance and Variation
184656
Which of the following pairs of chromosomal mutation are most likely to occur when homologous chromosomes are undergoing synapsis?
1 Deletion and inversion
2 Duplication and translocation
3 Deletion and duplication
4 Inversion and translocation
Explanation:
: The pairing of homologous chromosomes is also called as synapsis. The synapsis result in exchange of segments between mon sister chromtids of a homologous chromosomes separate, the chromosome tumber is reduced to one half during mesiosis. - In deletion, a part of a chromosome is lost thus decreasing the chromosal length. - In duplication, a segment is copied and reattached thus increasing chromosomal length.
Punjab MET-2007
Principle of Inheritance and Variation
184665
A mutagen pollutant is:
1 organophosphates
2 resins
3 chlorinated hydrocarbons
4 ritrogen oxides
Explanation:
: A mutagen pollutant is a physical or chemical agent that permanently changes genetic material usually in DNA. Metabolites of Polyacrylic Aromatic Hydrocarbons (PAHS) are mutagenic as they act as carcirogenic. Eg. acenaphthylene. Primiple of Inheritance and Variation
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Principle of Inheritance and Variation
184641
Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangement called?
1 Point mutation
2 Analog substitution
3 Frame shift mutation
4 Tautomerisational mutation
Explanation:
: Nomally DNA molecule has A-T, G-C pairing. However these base can exist in alternative walency status, owing to rearrangement is called Tautomerisational mutation. - A tautomeric shift in one strand has produced a transition mutation in the complementary strand. - A tautomeric shift is not itself a mutation but transient change to an altemative form of the molecule.
DUMET-2001
Principle of Inheritance and Variation
184655
Theory of 'saltations' was given by?
1 G Mendel
2 Hugo de Vries
3 JBS Haldane
4 H J Miller
Explanation:
: The saltation theory was given by Hugo de Vries. - Saltation is a type of sudden changellarge-scale nutational changes from one generation to the next generation and his potential of causing single-step speciation. - Accorting to Hugo de Vries, species are not formed by contimous variation but by a sudden appearance of variations, which was termed as mutation. This was known as the theory of saltations or mutation theory.
AIIMS-2011
Principle of Inheritance and Variation
184656
Which of the following pairs of chromosomal mutation are most likely to occur when homologous chromosomes are undergoing synapsis?
1 Deletion and inversion
2 Duplication and translocation
3 Deletion and duplication
4 Inversion and translocation
Explanation:
: The pairing of homologous chromosomes is also called as synapsis. The synapsis result in exchange of segments between mon sister chromtids of a homologous chromosomes separate, the chromosome tumber is reduced to one half during mesiosis. - In deletion, a part of a chromosome is lost thus decreasing the chromosal length. - In duplication, a segment is copied and reattached thus increasing chromosomal length.
Punjab MET-2007
Principle of Inheritance and Variation
184665
A mutagen pollutant is:
1 organophosphates
2 resins
3 chlorinated hydrocarbons
4 ritrogen oxides
Explanation:
: A mutagen pollutant is a physical or chemical agent that permanently changes genetic material usually in DNA. Metabolites of Polyacrylic Aromatic Hydrocarbons (PAHS) are mutagenic as they act as carcirogenic. Eg. acenaphthylene. Primiple of Inheritance and Variation
184641
Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangement called?
1 Point mutation
2 Analog substitution
3 Frame shift mutation
4 Tautomerisational mutation
Explanation:
: Nomally DNA molecule has A-T, G-C pairing. However these base can exist in alternative walency status, owing to rearrangement is called Tautomerisational mutation. - A tautomeric shift in one strand has produced a transition mutation in the complementary strand. - A tautomeric shift is not itself a mutation but transient change to an altemative form of the molecule.
DUMET-2001
Principle of Inheritance and Variation
184655
Theory of 'saltations' was given by?
1 G Mendel
2 Hugo de Vries
3 JBS Haldane
4 H J Miller
Explanation:
: The saltation theory was given by Hugo de Vries. - Saltation is a type of sudden changellarge-scale nutational changes from one generation to the next generation and his potential of causing single-step speciation. - Accorting to Hugo de Vries, species are not formed by contimous variation but by a sudden appearance of variations, which was termed as mutation. This was known as the theory of saltations or mutation theory.
AIIMS-2011
Principle of Inheritance and Variation
184656
Which of the following pairs of chromosomal mutation are most likely to occur when homologous chromosomes are undergoing synapsis?
1 Deletion and inversion
2 Duplication and translocation
3 Deletion and duplication
4 Inversion and translocation
Explanation:
: The pairing of homologous chromosomes is also called as synapsis. The synapsis result in exchange of segments between mon sister chromtids of a homologous chromosomes separate, the chromosome tumber is reduced to one half during mesiosis. - In deletion, a part of a chromosome is lost thus decreasing the chromosal length. - In duplication, a segment is copied and reattached thus increasing chromosomal length.
Punjab MET-2007
Principle of Inheritance and Variation
184665
A mutagen pollutant is:
1 organophosphates
2 resins
3 chlorinated hydrocarbons
4 ritrogen oxides
Explanation:
: A mutagen pollutant is a physical or chemical agent that permanently changes genetic material usually in DNA. Metabolites of Polyacrylic Aromatic Hydrocarbons (PAHS) are mutagenic as they act as carcirogenic. Eg. acenaphthylene. Primiple of Inheritance and Variation
184641
Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangement called?
1 Point mutation
2 Analog substitution
3 Frame shift mutation
4 Tautomerisational mutation
Explanation:
: Nomally DNA molecule has A-T, G-C pairing. However these base can exist in alternative walency status, owing to rearrangement is called Tautomerisational mutation. - A tautomeric shift in one strand has produced a transition mutation in the complementary strand. - A tautomeric shift is not itself a mutation but transient change to an altemative form of the molecule.
DUMET-2001
Principle of Inheritance and Variation
184655
Theory of 'saltations' was given by?
1 G Mendel
2 Hugo de Vries
3 JBS Haldane
4 H J Miller
Explanation:
: The saltation theory was given by Hugo de Vries. - Saltation is a type of sudden changellarge-scale nutational changes from one generation to the next generation and his potential of causing single-step speciation. - Accorting to Hugo de Vries, species are not formed by contimous variation but by a sudden appearance of variations, which was termed as mutation. This was known as the theory of saltations or mutation theory.
AIIMS-2011
Principle of Inheritance and Variation
184656
Which of the following pairs of chromosomal mutation are most likely to occur when homologous chromosomes are undergoing synapsis?
1 Deletion and inversion
2 Duplication and translocation
3 Deletion and duplication
4 Inversion and translocation
Explanation:
: The pairing of homologous chromosomes is also called as synapsis. The synapsis result in exchange of segments between mon sister chromtids of a homologous chromosomes separate, the chromosome tumber is reduced to one half during mesiosis. - In deletion, a part of a chromosome is lost thus decreasing the chromosal length. - In duplication, a segment is copied and reattached thus increasing chromosomal length.
Punjab MET-2007
Principle of Inheritance and Variation
184665
A mutagen pollutant is:
1 organophosphates
2 resins
3 chlorinated hydrocarbons
4 ritrogen oxides
Explanation:
: A mutagen pollutant is a physical or chemical agent that permanently changes genetic material usually in DNA. Metabolites of Polyacrylic Aromatic Hydrocarbons (PAHS) are mutagenic as they act as carcirogenic. Eg. acenaphthylene. Primiple of Inheritance and Variation