Question
_______ is the most mutagenic among UV rays.
UV A.
UV B.
UV C.
None of the above.
UV A.
UV B.
UV C.
None of the above.
Hint:
Radiations with shorter wavelength have more energy.
The correct answer is: UV C.
- UV or ultraviolet radiation is an electromagnetic radiation
- UV radiations have a wavelength of 100-400 nm
- UV rays are divided into 3 bands:
- UV A: 315-400 nm
- UV B: 280-315 nm
- UV C: 100-280 nm
- Radiations with shorter wavelength will have higher energy and more destructive power
- UV C has the most damaging effect of all
- UV B and UV C have mutagenic effects
- The UV C radiations are filtered by the atmosphere
- Transition mutation is caused by UV C
Related Questions to study
__________is the degree by which differences are seen in parents and their off-springs.
Heredity.
Inheritance.
Variation.
Recombination.
__________is the degree by which differences are seen in parents and their off-springs.
Heredity.
Inheritance.
Variation.
Recombination.
Physical mutagens include:
UV rays.
X- rays.
Gamma rays.
All of the above.
Physical mutagens include:
UV rays.
X- rays.
Gamma rays.
All of the above.
When a gene pair hides the effect of another gene, the phenomenon is called ____________.
- Dominance
- Segregation
Epistasis
- Mutation
When a gene pair hides the effect of another gene, the phenomenon is called ____________.
- Dominance
- Segregation
Epistasis
- Mutation
Which of the following traits were not used by Mendel?
Pod color
Pod length
Pod shape
None of the above
Which of the following traits were not used by Mendel?
Pod color
Pod length
Pod shape
None of the above
The phenotypic ratio of a dihybrid cross is?
1 : 2 : 2 : 1
3 : 1
9 : 3 : 3 : 1
9 : 2 : 2 : 1
The phenotypic ratio of a dihybrid cross is?
1 : 2 : 2 : 1
3 : 1
9 : 3 : 3 : 1
9 : 2 : 2 : 1
After true-breeding, tall and dwarf plants were cross-fertilized, the F1 generation was self-fertilized. The resultant plants have genotype in the ratio
1:2:1 (heterozygous tall : homozygous tall : dwarf)
3:1 (tall : dwarf)
3:1 (dwarf : tall)
1:2:1 (homozygous tall : heterozygous tall : homozygous dwarf)
After true-breeding, tall and dwarf plants were cross-fertilized, the F1 generation was self-fertilized. The resultant plants have genotype in the ratio
1:2:1 (heterozygous tall : homozygous tall : dwarf)
3:1 (tall : dwarf)
3:1 (dwarf : tall)
1:2:1 (homozygous tall : heterozygous tall : homozygous dwarf)
How many pair of contrasting characters were studied by Mendel?
Four
Six
Five
Seven
How many pair of contrasting characters were studied by Mendel?
Four
Six
Five
Seven
In the given diagram, all the f1 progeny is yellow because:
f1 genotype is homozygous.
Yellow is dominant over green.
Both parents had alleles for yellow colour.
None of the above.
In the given diagram, all the f1 progeny is yellow because:
f1 genotype is homozygous.
Yellow is dominant over green.
Both parents had alleles for yellow colour.
None of the above.
According to Mendel, what was responsible for the inheritance of specific traits?
Genes
Factors
Chromosomes
DNA
According to Mendel, what was responsible for the inheritance of specific traits?
Genes
Factors
Chromosomes
DNA
An organism with two identical alleles is
Heterozygous
Homozygous
Dominant
Recessive
An organism with two identical alleles is
Heterozygous
Homozygous
Dominant
Recessive
In the given diagram, which of the following accounts for the green pea seed in the f2 generation?
- Yellow is dominant over the green one.
- On average, one out of four offspring of heterozygous parents will be homozygous recessive.
- All The f1 generation parents are homozygous yellow.
- All of the above.
In the given diagram, which of the following accounts for the green pea seed in the f2 generation?
- Yellow is dominant over the green one.
- On average, one out of four offspring of heterozygous parents will be homozygous recessive.
- All The f1 generation parents are homozygous yellow.
- All of the above.
If the genotype has one dominant and one recessive allele, then the phenotype will be :
Dominant
Recessive
A hybrid
None of the above
If the genotype has one dominant and one recessive allele, then the phenotype will be :
Dominant
Recessive
A hybrid
None of the above
An allele is considered as:
A homozygous genotype
A heterozygous genotype
Several possible forms of a gene
Another word for a gene
An allele is considered as:
A homozygous genotype
A heterozygous genotype
Several possible forms of a gene
Another word for a gene
In sexual reproduction ______ gametes fuse to form _________ zygote.
Diploid, haploid
Diploid, haploid
Haploid, diploid
Haploid, haploid
In sexual reproduction ______ gametes fuse to form _________ zygote.
Diploid, haploid
Diploid, haploid
Haploid, diploid
Haploid, haploid
Genotype is referred to as the_________________
Appearance of an organism.
Genetic makeup of an organism.
Behavior of an organism.
Relative health of an organism.
Genotype is referred to as the_________________
Appearance of an organism.
Genetic makeup of an organism.
Behavior of an organism.
Relative health of an organism.
