Evolution of Homologous Genes

View the animation below, then complete the quiz to test your knowledge of the concept.

1		Homologous genes are best described as genes that
			A)	have identical sequences.
			B)	have a common ancestral gene.
			C)	have similar functions.
			D)	are on the same chromosome.
			E)	are on homologous chromosomes.
2		Homologous genes within a single species are said to be
			A)	orthologs.
			B)	paralogs.
			C)	metalogs.
			D)	xenologs.
			E)	homologs.
3		A misaligned cross over between two homologous chromosomes usually results in
			A)	a deletion in one chromosome and no change in the other.
			B)	a deletion in one chromosome and a duplication in the other.
			C)	deletions in both chromosomes.
			D)	duplications in both chromosomes.
			E)	no change in either chromosome.
4		Gene duplications have no effect on evolution.
			A)	True
			B)	False
5		Homologous genes are the result of random mutations accumulated over the course of many generations.
			A)	True
			B)	False