Questions in genetics

Select	Question
	Which of the following is the main category of mutation
	In human beings, multiple genes are involved in the inheritance of
	The formation of multivalents at meiosis in diploid organism is due to
	Mental retardation in man, associated with sex chromosomal abnormality is usually due to
	The reason of fault in gene duplication is
	If haploid chromosome number in a cell is 12. The monosomic number will be
	Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangements called
	Who reported that Down’s syndrome is due to extra 21st chromosome
	Mutation caused by a mutagen is
	Discontinuous variations are