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Question

Select the statements that are true for genes.

i. Genes are specific sequences of nucleotides in a DNA molecule.
ii. A gene does not store information for protein synthesis.
iii. In individuals of a given species, a specific gene is located on a particular chromosome.
iv. Each chromosome has only one gene.
v. Genome identification is the basis of DNA fingerprinting.

A
i, ii and iii
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B
i, iii and v
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C
i, iii and iv
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D
ii, iv and v
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Solution

The correct option is B i, iii and v
Characteristics of a gene can be listed as follows:
  1. A gene is a specific sequence of nucleotides present in a strand of DNA molecule.
  2. The information about protein synthesis is stored in the genes. Sequence of bases in a gene determine which amino acids constitute a protein molecule.
  3. In an individual of a given species, every gene has a fixed location on a particular chromosome.
  4. Genes are present in the chromosomes and a single chromosome can have many genes.
  5. In DNA fingerprinting, the sequence of the nucleotides in certain areas of DNA which are unique to each individual are determined. Hence, this technique is used to identify lineage and criminals.

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