The mechanism that causes a gene to move from one linkage group to another is called
inversion
duplication
translocation
crossingover.
Which one of the following is not a mutagen
One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of $F_{2}$-progenies that mutation is found in
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child ?
Some individuals with blood group -$A$ may inherit the genes for blonde hair, while other individuals with blood group -$A$ may the gene for brown hair. This can be best explained by the principle of
The number of chromosomes in Klinefelter’s syndrome is