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DAILY FREE MCQ CHALLENGE for Pre-Medical Entrance Preparation
Question
Number of chromosomes in human beings:
A. 23 pairs
B. 27 pairs
C. 28 pairs
D. 19 pairs
NOTEImportant Question from KERALA
See Answer Here
A. 23 pairs
See Explanation Here
23 pairs of chromosomes are present in human beings. Out of 23 pairs of chromosomes present, 22 pairs are exactly same in both males and females; these are the autosomes. A pair of X-chromosomes are present in the female, whereas the presence of an X and Y chromosome are determinant of the male characteristic.
References
NCERT Biology Text, Class: XII, Unit VII: Genetics and Evolution, Chapter 5: Principles of Inheritance and Variation, Page No: 86.
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