An abnormal human baby with $‘XXX’$ sex chromosomes was born due to
fusion of two ova and one sperm
fusion of two sperms and one ovum
formation of abnormal sperms in the father
formation of abnormal ova in the mother.
What will be the number of linkage groups in maize if it has $10$ pairs of chromosomes
When heterozygous tall plants are self-pollinated than tall and dwarf plants are obtained, this is explain to
$21$ trisomy in humans causes
Linkage was first suggested by
Which of the following type of mutation involves the reverse order of genes in a chromosome?