Genetic Mutations - Change the DNA

Original DNA: TAC GAA CCT ATC

Which is the THIRD triplet in the sequence above?

• TAC

• GAA

• CCT

• ATC

• C

Original DNA: TGC GAA CCT ATC TAA

Which letter is the 'second base' in the fourth triplet?

• A

• C

• G

• T

Answer explanation

Which letter is the 'second base' in the fourth triplet?

TGC GAA CCT ATC TAA

CTA GGA ATC GAA AGT ACC ATC

What is the SECOND triplet of this sequence?

(a)  

Answer explanation

CTA GGA ATC GAA AGT ACC ATC

What is the SECOND triplet of this sequence?

CTA GGA ATC GAA AGT ACC ATA

What is the third base in the sixth triplet?

(a)  

Answer explanation

CTA GGA ATC GAA AGT ACC ATC

What is the third base in the sixth triplet?

Original DNA: TAC GAA CCT

Mutated DNA: TAC GAA CAT

What type of mutation?

• Insertion

• Deletion

• Duplication

• Substitution

• Inversion

Answer explanation

Original DNA: TAC GAA CCT

Mutated DNA: TAC GAA CAT

Substitution - The Second C in the third triplet was replaced by an 'A".

Tags

NGSS.HS-LS3-2

Original DNA: TAC GAA CCT ATC

Mutated DNA: CAT GAA CCT ATC

What type of mutation?

• Insertion

• Deletion

• Duplication

• Substitution

• Inversion

Answer explanation

Original DNA: TAC GAA CCT ATC

Mutated DNA: CAT GAA CCT ATC

Inversion - The TAC was "FLIPPED" to CAT this is an inversion think of 'flipping' a pancake. Read the code backwards

Tags

NGSS.HS-LS3-2

Original DNA: TAC GAA CCT ATC

Mutated DNA: TAC GAC CTA TC

What type of mutation?

• Insertion

• Deletion

• Duplication

• Substitution

• Inversion

Answer explanation

Original DNA: TAC GAA CCT ATC

Mutated DNA: TAC GAC CTA TC

Deletion - The "second A" was removed deleted. This causes all the letter to the right to shift one to the left. This really causes problems!

Tags

NGSS.HS-LS3-2

Original DNA: TAC GAA CCT ATC

Mutated DNA: TAC GAA CCT CCT ATC

What type of mutation?

• Insertion

• Deletion

• Duplication

• Substitution

• Inversion

Answer explanation

Original DNA: TAC GAA CCT ATC

Mutated DNA: TAC GAA CCT CCT ATC

Duplication - Notice how the CTT (3rd triplet) is written TWICE - DUPLICATED

Tags

NGSS.HS-LS3-2

Original DNA: TAC GAA CCT ATC

Mutated DNA: TAT CGA ACC TAT C

What type of mutation?

• Insertion

• Deletion

• Duplication

• Substitution

• Inversion

Answer explanation

Original DNA: TAC GAA CCT ATC

Mutated DNA: TAT CGA ACC TAT C

What type of mutation? NOTICE how the "T" has been added in between the A and C of the first triplet. This shifts all the bases one to the right. This really messes with the DNA code!

Tags

NGSS.HS-LS3-2

Original DNA: TAC ACG CAT ATT

Write the new 'code' in triplet form if the following mutation is made:

Substitution mutation of the third base of the second triplet with a 'C'

(a)  

Tags

NGSS.HS-LS3-2