alleryA normal human body cell contains 23 pairs of chromosomes. How many of these pairs are autosomes?
A22 pairs
B21 pairs
C23 pairs
D20 pairs
Answer & Solution
Correct answer: A. 22 pairs
1. A human cell normally has 23 pairs of chromosomes in total.
2. Of these, one pair is the sex chromosome or allosome.
3. So the autosomes are 23 minus 1 = 22 pairs.
4. Therefore the number of autosome pairs is 22, option A.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 18 Genetics "Karyotype", p.273_
Keep practising Unit 5C: Non-Mendelian Genetics & Population Transmission
Browse all Unit 5C: Non-Mendelian Genetics & Population Transmission questions for AP Biology, or explore more Biology topics.
Related questions
Which of the following is **not** a stop codon?The semiconservative nature of DNA replication was experimentally proved by:The F₂ **genotypic** ratio in Mendel's monohybrid cross is:In Mendel's monohybrid cross between true-breeding tall (TT) and dwarf (tt) plants, the F₂Mendel conducted his hybridisation experiments on which plant?In the Watson-Crick double helix, adenine pairs with thymine via how many hydrogen bonds?In birds, the sex-determination mechanism is:Down syndrome in humans is caused by