Question

Which of the following codes describes position 12 on the long arm of chromosome 13?

a. 13p12

b. 13q12

c. 12p13

d. 12q13

Short answer

The correct answer is B.

Step-by-step solution

Step. 1 Introduction

A particular genetic location on a chromosome is based on a combination of numbers and letters. The chromosome is characterised with the first number or alphabet being used to identify the location of a gene. The chromosomal arm is perhaps the second half within the location for the gene. Lastly, the gene's location on the p or q arm.

Step. 2 Explanation for correct answer

The position of genes on a chromosome is indicated by numbers put just after p or q arm of its chromosome. A gene's location 12 is on the q arm, which seems to be the long arm.

Step. 3 Explanation for incorrect answer

Option a. A gene's location 12 cannot be on the p arm since that is the short arm.

Option c. No, 12p13 cannot be possible for a chromosome.

Option d. No, 12q13 on a chromosome will not be feasible.