Select the correct answer from each drop-down menu. Complete the blanks in the sentences that relate to chromosomes and their features.

Human cells have pairs of chromosomes. An abnormality of one or more genes is called .

Drop down 1
23
46
32
64

Drop down 2
Allele
Mutation
genetic variant

How can a person  best  reduce the risk of injuries on the road?  

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors. b) transcription from the host cell rna polymerase introduces numerous mutations. c) capsid proteins from the host cell can replace the viral capsid. d) viral rna is translated by host cell ribosomes.

Which statement about adolescene is false