Question

Amber mutant of T4 phage is formed due to missense type of mutation.

Answer 1

an amber mutant of phage t4 contain a mutation that change a codon for an amino acid in a protein to the nonsense stop codon TAG (see stop codon and nonsense MUTATION) ....as a consequences few if any vaibla phage are formed

Answer 2

Answer:

Amber mutant of T4 phage is formed due to missense type of mutation is called a nonsense mutation.

Explanation:

• Bypass31 (byp3l) T4 bacteriophage mutants that inhibit gene 31 amber mutations have been identified and described.
• The byp31 mutation, byp31-1, suppresses gene 31 nonsense mutations through a method that does not involve gp3l production or a specific gp3l fragment; also, the byp31 allele suppresses all nonsense mutations in gene 31 that have been investigated.
• The T4 particles produced in su- cells by the T4amN54byp31-1 double mutant have no unique features.
• In the absence of gp31, these virions had normal heat sensitivity, normal osmotic shock sensitivity, and normal morphology.

Hence, amber mutants of the T4 phage are formed due to nonsense mutations.

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