What will be the number of linkage groups in maize if it has $10$ pairs of chromosomes
$5$
$10$
Zero
$20$
Both sickle cell anaemia and Huntington’s chorea are
If in a child of $10$ years ages of the intelligence is of $14$ years child, the $I.Q.$ of this child would be
The Barr body is observed in
A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children ($2$ daughters and $5$ sons). Three of the sons suffer from the given disease but none of the daughters are affected which of the following mode of inheritance do you suggest for this disease
Example of environmental determination of sex is/are