Q. 8 - Biology

Question

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

a. 13p12

b. 13q12

c. 12p13

d. 12q13

Step-by-Step Solution

Answer

The correct answer is B.

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.