The male honeybees:
1. do not have father and cannot have sons
2. do not have father but can have sons
3. do not have grandfather and cannot have grandsons
4. do not have father and do not have grandfather

Sons inherit the following exclusively from their mothers:
I. SR Y gene
II. X chromosome
III. Mitochnodrial DNA
1. Only II
2. Only I and III
3. Only II and III
4. Only III

An abnormal human of the karyotype 49, XXXYY will form how many Barr bodies?

1. 1
2. 2
3. 3
4. 4