342574
Assertion : Haploids are used to study mutations. Reason : Most of the mutations are recessive.
1 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Mutations can be either recessive or dominant. In haploid organisms such as viruses and bacteria , both recessive and dominant mutations is identified by their effects on the phenotype of the organisms from which they occurred. Therefore, in many crops desirable mutants are isolated among haploids derived in culture.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342575
Genetic variation in a population arises due to
1 Reproductive isolation and selection
2 Recombination only
3 Mutations as well as recombination
4 Mutations only
Explanation:
Genetic variation can be caused by mutation, random mating, random fertilization, and recombination between homologous chromosomes during meiosis .
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342576
What are the chemical and physical factors that induce mutations called?
1 Mutagens
2 Oncogens
3 Mutants
4 Mitogens
Explanation:
There are many chemical and physical factors that induce mutations. These are referred to as mutagens. UV radiations can cause mutations in organisms – it is a mutagen.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342577
A mutation is a
1 Change in phenotype followed by a change in genotype.
2 Sudden temporary change in an organism’s genetic material.
3 Change in genotype which may result in a new expression of a characteristic.
4 Change in hereditary material never directed by a changing environment..
Explanation:
Mutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and the phenotype of an organism.
342574
Assertion : Haploids are used to study mutations. Reason : Most of the mutations are recessive.
1 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Mutations can be either recessive or dominant. In haploid organisms such as viruses and bacteria , both recessive and dominant mutations is identified by their effects on the phenotype of the organisms from which they occurred. Therefore, in many crops desirable mutants are isolated among haploids derived in culture.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342575
Genetic variation in a population arises due to
1 Reproductive isolation and selection
2 Recombination only
3 Mutations as well as recombination
4 Mutations only
Explanation:
Genetic variation can be caused by mutation, random mating, random fertilization, and recombination between homologous chromosomes during meiosis .
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342576
What are the chemical and physical factors that induce mutations called?
1 Mutagens
2 Oncogens
3 Mutants
4 Mitogens
Explanation:
There are many chemical and physical factors that induce mutations. These are referred to as mutagens. UV radiations can cause mutations in organisms – it is a mutagen.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342577
A mutation is a
1 Change in phenotype followed by a change in genotype.
2 Sudden temporary change in an organism’s genetic material.
3 Change in genotype which may result in a new expression of a characteristic.
4 Change in hereditary material never directed by a changing environment..
Explanation:
Mutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and the phenotype of an organism.
342574
Assertion : Haploids are used to study mutations. Reason : Most of the mutations are recessive.
1 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Mutations can be either recessive or dominant. In haploid organisms such as viruses and bacteria , both recessive and dominant mutations is identified by their effects on the phenotype of the organisms from which they occurred. Therefore, in many crops desirable mutants are isolated among haploids derived in culture.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342575
Genetic variation in a population arises due to
1 Reproductive isolation and selection
2 Recombination only
3 Mutations as well as recombination
4 Mutations only
Explanation:
Genetic variation can be caused by mutation, random mating, random fertilization, and recombination between homologous chromosomes during meiosis .
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342576
What are the chemical and physical factors that induce mutations called?
1 Mutagens
2 Oncogens
3 Mutants
4 Mitogens
Explanation:
There are many chemical and physical factors that induce mutations. These are referred to as mutagens. UV radiations can cause mutations in organisms – it is a mutagen.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342577
A mutation is a
1 Change in phenotype followed by a change in genotype.
2 Sudden temporary change in an organism’s genetic material.
3 Change in genotype which may result in a new expression of a characteristic.
4 Change in hereditary material never directed by a changing environment..
Explanation:
Mutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and the phenotype of an organism.
342574
Assertion : Haploids are used to study mutations. Reason : Most of the mutations are recessive.
1 Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
2 Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
3 Assertion is true but Reason is false.
4 Both Assertion and Reason are false.
Explanation:
Mutations can be either recessive or dominant. In haploid organisms such as viruses and bacteria , both recessive and dominant mutations is identified by their effects on the phenotype of the organisms from which they occurred. Therefore, in many crops desirable mutants are isolated among haploids derived in culture.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342575
Genetic variation in a population arises due to
1 Reproductive isolation and selection
2 Recombination only
3 Mutations as well as recombination
4 Mutations only
Explanation:
Genetic variation can be caused by mutation, random mating, random fertilization, and recombination between homologous chromosomes during meiosis .
AIPMT - 2013
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342576
What are the chemical and physical factors that induce mutations called?
1 Mutagens
2 Oncogens
3 Mutants
4 Mitogens
Explanation:
There are many chemical and physical factors that induce mutations. These are referred to as mutagens. UV radiations can cause mutations in organisms – it is a mutagen.
BIOXII05: PRINCIPLES OF INHERITANCE AND VARIATION
342577
A mutation is a
1 Change in phenotype followed by a change in genotype.
2 Sudden temporary change in an organism’s genetic material.
3 Change in genotype which may result in a new expression of a characteristic.
4 Change in hereditary material never directed by a changing environment..
Explanation:
Mutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and the phenotype of an organism.
