How many pairs of human chromosomes are not the sex chromosomes?
A22
B12
C42
D32
Answer & Solution
Correct answer: A. 22
1. Most human chromosomes have a maternal and a paternal copy.
2. There are 22 such pairs.
3. One further pair, the sex chromosomes, is not always a perfect pair.
_Source: NCERT Class 10 Science, Ch 9 'Heredity and Evolution'_
Related questions
Fossils found closer to the earth's surface are generally:The similar basic structure of limbs in mammals, birds and reptiles makes them:Why is the low weight of a starving beetle not inherited?Blue beetles surviving because an elephant crushed the bushes is a case of:Green beetles came to outnumber red ones in the bush because:A child who inherits a Y chromosome from the father will be a:The sex chromosomes of a woman are:Each germ cell must carry how many sets of genes?