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Time taken by an object falling from rest to cover the height of $h_1$ and $h_2$ is respectively $t_1$ and $t_2$. Then the ratio of $t_1$ to $t_2$ is:
The correct order of dissociation energy of $N_{2}$ and $N_{2}^{+}$ is:
Which of the following most appropriately describes haemophilia?
A pink flowered Snapdragon plant was crossed with red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?
Which one of the following traits of garden peas studied by Mendel was a recessive feature?
Which of the following is NOT an autosomal recessive disorder?
A true statement for Ulothrix:
A body falls from a height $h=200 \text{ m}$ (at New Delhi). The ratio of distance travelled in each $2 \text{ sec}$ during $t = 0$ to $t = 6$ second of the journey is:
The stability of $Cu^{2+}$ is greater than that of $Cu^+$ salts in an aqueous solution due to:
What change occurs by changing one base in DNA?
The genotype of a plant showing the dominant phenotype can be determined by:
When dominant and recessive alleles express themselves together it is called:
Given below are two statements: Statement I: When many alleles of a single gene govern a character, it is called polygenic inheritance. Statement II: In polygenic inheritance, the effect of each allele is additive. In the light of the above statements, choose the correct answer from the options given below:
Among the following, isoelectronic species are:
The mother has A+ blood group, the father has B+ and the child is A+. What can be possible genotypes of all three, respectively?
A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:
ABO blood groups in humans are controlled by the gene I. It has three alleles – , and . How many phenotypes are possible?
A woman with 47 chromosomes, due to three copies of chromosome 21, is characterized by:
Match List I with List II: List I A. Down's syndrome B. Turner's syndrome (Inferred) C. Thalassemia (Inferred) D. Klinefelter's syndrome (Note: List II typically contains the chromosomal cause/karyotype)
What initiation and termination factors are involved in transcription in prokaryotes?