Home › CBSE Class 12 › Biology › Principles Of Inheritance › How many chromosomes are there in a normal human…
How 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: NCERT Class 12 Biology, Ch 5 'Principles of Inheritance and Variation'_
Related questions
The gain or loss of a single chromosome is called:Turner's syndrome in human females results from the loss of:Down's syndrome results from an extra copy of chromosome:In sickle-cell anaemia the red cell changes from a biconcave disc to a:A heterozygous female for haemophilia is called a:Morgan carried out his crosses using:Who proposed the chromosomal theory of inheritance?The F2 ratio in a dihybrid cross is: