alleryHow many chromosomes are there in a normal human cell?
A48
B44
C42
D46
Answer & Solution
Correct answer: D. 46
1. Human chromosomes come in pairs.
2. The total number in a normal human cell is 46, that is 23 pairs.
3. Of these 22 pairs are autosomes and one pair are sex chromosomes.
_Source: syllabus Biology, Ch 5 'Principles of Inheritance and Variation'_
Keep practising Principles of Inheritance and Variation
Browse all Principles of Inheritance and Variation questions for CBSE Class 12 (Science), or explore more Biology topics.
Related questions
Who first described Down's syndrome, in 1866?Failure of cytokinesis after telophase leads to which condition, common in plants?The gain or loss of a chromosome due to failure of chromatid segregation is called what?What is the karyotype in Klinefelter's syndrome?What chromosome constitution does a person with Turner's syndrome have?Which genotype shows the diseased phenotype of sickle-cell anaemia?In sickle-cell anaemia, which amino acid replaces glutamic acid in the beta globin chain?Sickle-cell anaemia is inherited as which type of trait?