If in a child of $10$ years ages of the intelligence is of $14$ years child, the $I.Q.$ of this child would be

Which one of the following mutation partially or fully reverses the harmful effects of previous mutation

Number of linkage group in Pisum sativum is

What will be the number of linkage groups in maize if it has $10$ pairs of chromosomes

Drosophila melanogastor has $8$ chromosomes in somatic cell. How many linkage groups will be there