science
Grade-10
Easy
Question
Physical mutagens include:
UV rays.
X- rays.
Gamma rays.
All of the above.
UV rays.
X- rays.
Gamma rays.
All of the above.
Hint:
Electromagnetic radiations fall under the category of physical mutagens.
The correct answer is: All of the above.
- Mutation is the change in the sequence of genetic material of an individual
- The mutation can be caused by error in cell division or due to external factors
- The factors causing mutation are called mutagens
- Mutagens can be classified into:
- Physical mutagen: Electromagnetic radiations like X rays, gamma rays, UV rays, etc
- Chemical mutagen: Chemical compounds like alkylating agents, heavy metals, etc
- Biological mutagen: Infectious organisms like viruses
- Mutation cause change in DNA sequence
- Not all mutations are harmful
- Some mutations are beneficial to survive, while some mutations may not produce any effect
Related Questions to study
science
Mutation occurs at the time of:
- Mutation can be due to genetic or environmental factors
- The cause of mutation is called mutagen
- The individual affected is called mutant
- Not all mutations are harmful
Mutation occurs at the time of:
scienceGrade-10
- Mutation can be due to genetic or environmental factors
- The cause of mutation is called mutagen
- The individual affected is called mutant
- Not all mutations are harmful
science
When a gene pair hides the effect of another gene, the phenomenon is called ____________.
- Genes are specific DNA sequence coding for a particular trait
- The phenotype of an individual is determined by the genotype
- The genotype is represented by the two alleles
When a gene pair hides the effect of another gene, the phenomenon is called ____________.
scienceGrade-10
- Genes are specific DNA sequence coding for a particular trait
- The phenotype of an individual is determined by the genotype
- The genotype is represented by the two alleles
science
Which of the following traits were not used by Mendel?
- Mendel used true breeding plants
- The parent generation were homozygous with contrasting characters
- The contrasting characters of the parents were dominant and recessive
Which of the following traits were not used by Mendel?
scienceGrade-10
- Mendel used true breeding plants
- The parent generation were homozygous with contrasting characters
- The contrasting characters of the parents were dominant and recessive
science
The phenotypic ratio of a dihybrid cross is?
The F2 generation of will have :
- 9 yellow round
- 3 round green
- 3 yellow wrinkled
- 1 green wrinkled
The phenotypic ratio of a dihybrid cross is?
scienceGrade-10
The F2 generation of will have :
- 9 yellow round
- 3 round green
- 3 yellow wrinkled
- 1 green wrinkled
science
After true-breeding, tall and dwarf plants were cross-fertilized, the F1 generation was self-fertilized. The resultant plants have genotype in the ratio
- The F1 generation will all exhibit the dominant trait for parents having contrasting homozygous genotype
- The F2 generation will have combination of genotype
After true-breeding, tall and dwarf plants were cross-fertilized, the F1 generation was self-fertilized. The resultant plants have genotype in the ratio
scienceGrade-10
- The F1 generation will all exhibit the dominant trait for parents having contrasting homozygous genotype
- The F2 generation will have combination of genotype
science
How many pair of contrasting characters were studied by Mendel?
- Mendel used true breeding plants
- The parent generation were homozygous with contrasting characters
How many pair of contrasting characters were studied by Mendel?
scienceGrade-10
- Mendel used true breeding plants
- The parent generation were homozygous with contrasting characters
science
In the given diagram, all the f1 progeny is yellow because:
- F1 generation of parents with homozygous genes (one dominant and other recessive) will be all dominant
- F2 generation will have both dominant and recessive phenotypes with different genotypes
In the given diagram, all the f1 progeny is yellow because:
scienceGrade-10
- F1 generation of parents with homozygous genes (one dominant and other recessive) will be all dominant
- F2 generation will have both dominant and recessive phenotypes with different genotypes
science
According to Mendel, what was responsible for the inheritance of specific traits?
- Inheritance is the transmission of genes down to future generations
- Laws of inheritance were proposed by Mendel
- Laws of inheritance include: Law of dominance, Law of segregation and Law of independent assortment
- The gene is the hereditary unit
- The physical traits are due to the expression of genes
According to Mendel, what was responsible for the inheritance of specific traits?
scienceGrade-10
- Inheritance is the transmission of genes down to future generations
- Laws of inheritance were proposed by Mendel
- Laws of inheritance include: Law of dominance, Law of segregation and Law of independent assortment
- The gene is the hereditary unit
- The physical traits are due to the expression of genes
science
An organism with two identical alleles is
- Alleles determine the phenotype of an organism
- Alleles can be homozygous or heterozygous
- Recessive trait will be masked in heterozygous alleles
An organism with two identical alleles is
scienceGrade-10
- Alleles determine the phenotype of an organism
- Alleles can be homozygous or heterozygous
- Recessive trait will be masked in heterozygous alleles
science
In the given diagram, which of the following accounts for the green pea seed in the f2 generation?
- F1 generation of parents with homozygous genes (one dominant and other recessive) will be all dominant
- F2 generation will have both dominant and recessive phenotypes with different genotypes
In the given diagram, which of the following accounts for the green pea seed in the f2 generation?
scienceGrade-10
- F1 generation of parents with homozygous genes (one dominant and other recessive) will be all dominant
- F2 generation will have both dominant and recessive phenotypes with different genotypes
science
If the genotype has one dominant and one recessive allele, then the phenotype will be :
- An allele refers to DNA sequences present in a particular locus
- The allele is the different versions or variants that are possible for a specific gene
- For a particular gene two alleles are present
- The allele is expressed as the phenotype
- Usually the dominant allele will be expressed
If the genotype has one dominant and one recessive allele, then the phenotype will be :
scienceGrade-10
- An allele refers to DNA sequences present in a particular locus
- The allele is the different versions or variants that are possible for a specific gene
- For a particular gene two alleles are present
- The allele is expressed as the phenotype
- Usually the dominant allele will be expressed
science
An allele is considered as:
- Alleles are sequence of nucleic acid that determine the phenotype of an organism
An allele is considered as:
scienceGrade-10
- Alleles are sequence of nucleic acid that determine the phenotype of an organism
science
In sexual reproduction ______ gametes fuse to form _________ zygote.
- Living organisms contain two types of cells: somatic cells and sex cells
- The somatic or body cells contain two sets of chromosomes and are called diploid
- The gametes contain single set of chromosomes and are called haploid
In sexual reproduction ______ gametes fuse to form _________ zygote.
scienceGrade-10
- Living organisms contain two types of cells: somatic cells and sex cells
- The somatic or body cells contain two sets of chromosomes and are called diploid
- The gametes contain single set of chromosomes and are called haploid
science
Genotype is referred to as the_________________
- Genotype of an individual is a combination of genes received from both parents
- The offspring will exert the characteristics of the dominant alone, though the genotype contains both dominant and recessive alleles
Genotype is referred to as the_________________
scienceGrade-10
- Genotype of an individual is a combination of genes received from both parents
- The offspring will exert the characteristics of the dominant alone, though the genotype contains both dominant and recessive alleles
science
If a cross between homozygous tall (TT) and homozygous dwarf pea plant (tt) is carried out then, the offspring of the F1 generation will be:
- Monohybrid cross between TT vs tt is as follows:
Gametes | T | T |
t | Tt | Tt |
t | Tt | Tt |
- Tt is heterozygous and represents tall offspring
If a cross between homozygous tall (TT) and homozygous dwarf pea plant (tt) is carried out then, the offspring of the F1 generation will be:
scienceGrade-10
- Monohybrid cross between TT vs tt is as follows:
Gametes | T | T |
t | Tt | Tt |
t | Tt | Tt |
- Tt is heterozygous and represents tall offspring