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Consider the following statements regarding Genome Sequencing: 1. Genome sequencing is figuring out the order of DNA nucleotides, or bases, in a genome—the order of Adenine, Cytosine, Guanines, and Thymine that make up an organism's DNA. 2. Human genome is made up of 46 chromosome pairs with a total of about 3 billion DNA base pairs. 3. There are 24 distinct human chromosomes: 22 autosomal chromosomes, plus the sex-determining X and Y chromosomes. Which of the statements given above is/are correct?

Consider the following statements regarding Genome Sequencing: 1. Genome sequencing is figuring out the order of DNA nucleotides, or bases, in a genome—the order of Adenine, Cytosine, Guanines, and Thymine that make up an organism's DNA. 2. Human genome is made up of 46 chromosome pairs with a total of about 3 billion DNA base pairs. 3. There are 24 distinct human chromosomes: 22 autosomal chromosomes, plus the sex-determining X and Y chromosomes. Which of the statements given above is/are correct? Correct Answer 1 and 3 only

The correct answer 1 and 3 only.

Key Points

  • Genome Sequencing 
    • Genome sequencing is figuring out the order of DNA nucleotides, or bases, in a genome—the order of Adenine, Cytosine, Guanines, and Thymine that make up an organism's DNA.
      • Hence statement 1 is correct.
    • Human genome
      • It is made up of 23 chromosome pairs with a total of about 3 billion DNA base pairs. Hence statement 2 is not correct.
      • There are 24 distinct human chromosomes: 22 autosomal chromosomes, plus the sex-determining X and Y chromosomes. Hence statement 3 is correct.
      • Chromosomes 1-22 are numbered roughly in order of decreasing size.
      • Somatic cells usually have one copy of chromosomes 1-22 from each parent, plus an X chromosome from the mother and either an X or Y chromosome from the father, for a total of 46.
      • There are an estimated 20,000-25,000 human protein-coding genes.​

Important Points

  • Genome Mapping
    • It describes the methods used to identify the locus of a gene and the distances between genes.
      • Gene mapping can also describe the distances between different sites within a gene.
    • Taking inspiration from the Human Genome Project, the Department of Biotechnology (DBT) initiated the ambitious “Genome India Project” (GIP) in January 2020.
      • ​The GIP aims to collect 10,000 genetic samples from citizens across India, to build a reference genome.

Related Questions

Consider the following statements and choose the correct answer:
1. Adenine pairs with thymine (A : T) and guanine with cytosine $$\left( {G \vdots C} \right)$$
2. Adenine and thymine are joined by three hydrogen bonds through atoms
3. Guanine and cytosine are joined by two hydrogen bonds through atoms
4. The weak hydrogen bonding enables the two strands of the DNA to separate during replication
Consider the following regarding the diseases caused by the irregularity in the chromosomes in the human body.  I. Down's Syndrome: Extra chromosome is added to the 23rd autosomal chromosome  II. Patau's Syndrome: Additional autosomal chromsome is added to the 14th autosomal chromsome  III. Sickle Cell Anaemia: Change in the 17th autosomal chromsome Which among the above is/are correct?
Consider the following statements about DNA Sequencing: 1. DNA Sequencing is used to detect the presence of a complementary sequence by hybridization with a nucleic acid sample. 2. DNA sequencing is the process of determining the nucleic acid sequence - the order of nucleotides in DNA. Which of the above statements is/are incorrect?
Following are a group of Nitrogeneous bases present in Nucleic acids. What is the total number of Pyrimidines in this group? Uracil, Guanine, Thymine, Adenine, Cytosine
Complete the equation. 2Res+OH– + 2– → __________ + 2OH– 2- b) (Res+)23- c) (Res+)22- d) (Res+)32-
The question given below consists of a statement, followed by three arguments I, II and III. You have to decide which of the arguments is/are ‘strong’ arguments is/are ‘weak’ arguments and accordingly choose your answer from the alternatives given below each question. Statement: India's burgeoning shadow finance sector is likely to face a shake-up after defaults at one major lender battered the nation's financial markets in the past week and reinforced worries about credit risk. Industry officials and experts say they expect Indian regulators to cancel the licences of as many as 1,500 smaller non-banking finance companies because they don't have adequate capital, and to also make it more difficult for new applicants to get approval. Which of the following argument(s) stated support(s) the given fact? Arguments: I. Better capitalised and more conservatively run finance firms are likely to swallow up an increasing number of smaller rivals. That could make it difficult for many small borrowers to get loans, especially in the countryside where two-thirds of India's 1.3 billion people live and put the brakes on a surge in private consumption with a knock-on effect on growth.  II. The shadow banking sector now comprises more than 11,400 firms with a combined balance-sheet worth 22.1 trillion rupees ($304 billion) and is less strictly regulated than banks. It has been attracting new investors, particularly as the nation's banks have had to slow their lending as they seek to work through $150 billion of stressed assets.  III. Nearly 11,000 of India's NBFCs are small and medium-sized businesses with an asset base of less than 5 billion rupees. But the top 400, many of which are backed by banks and finance companies, control about 90 percent of the assets under management.
Each of the question below consists of a question and three statements number I, II and III given below it. You have to decide whether the data provided in the statement are sufficient to answer the question. Two person X and Y together can make 25% of total number of bricks in 4.8 days. Another person Z can make 50 bricks in a day. What is the time taken by person X and Z together to make the total number of bricks? I. Dimensions of a brick is (3cm × 4cm × 5cm) while the dimension of a cuboids when all the bricks are put together is (72cm × 80cm × 50cm) and ratio of number of days taken by X and Y alone to make the total number of bricks is 3 : 2. II. The total number of bricks is 4800 and person Y can make 150 bricks in day. III. Total volume of all the bricks together is 1.008m3 and dimension of a bricks is (5cm × 6cm × 7cm) and time taken by Z to make total number of bricks is 200 % more than the total time taken by person Y to make total number of bricks.
Consider the following statements with regard to the functions of the centromere in the chromosome.
1. Centromeres are the centres of movement of the chromatids or chromosomes during anaphase separation.
2. Acentric chromosomes lack the capacity to segregate in a regular fashion.
3. Crosing-over in one arm of a metacentric chromosome does not affect the crossing over in the arm of the same chromosome.
Which of the statements given above are correct?
In each question below is given a statement numbered I, II and III. An assumption is something supposed or taken for granted. You have to consider the following assumption and decide which of the assumption is implicit in the statement. Statement: The Amazon.com Inc. founder, Jeff Bezos’s net worth broke $150 billion in New York on Monday morning, according to the Bloomberg Billionaires Index. That’s about $55 billion more than Microsoft Corp. co-founder Bill Gates, the world’s second-richest person. Bezos, 54, has now topped Gates in inflation-adjusted terms. The $100 billion mark that Gates hit briefly in 1999 at the height of the dot-com boom would be worth about $149 billion in today’s dollars. Assumptions: I. Jeff Bezos is the richest person in modern history. II. That makes the Amazon founder richer than anyone else on earth since at least 2000 when Forbes published its inaugural wealth ranking. III. Gates would have had a net worth of more than $150 billion if he’d held onto assets that he’s given away, largely to the Bill & Melinda Gates Foundation.
Consider the following statements.
1. Human beings have 23 pairs of chromosomes.
2. Sex chromosome in human male are named XY.
3. Chromosomes are best seen in metaphase.
Which of the statements given above is/are false about chromosomes?