Chromosomal Mutation

Notice the abnormal 23rd chromosome. This individual has an extra X chromosome. What type of mutation is this?

• Translocation

• Nondisjunction

• Dublication

• Inversion

• Deletion

Answer explanation

Nondisjunction is the failure of chromosomes to separate properly during cell division, leading to an extra chromosome, such as an additional X chromosome. This explains the abnormal 23rd chromosome observed in this individual.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Duplication

• A

• B

• C

• D

• E

Answer explanation

Choice A is correct because it directly addresses the concept of duplication, which is the focus of the question. The other options do not relate to the definition or implications of duplication.

Tags

NGSS.HS-LS1-4

Inversion

• A

• B

• C

• D

• E

Answer explanation

The correct answer is B because it accurately represents the concept of inversion, which involves reversing the order of elements. Other options do not align with this definition.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Translocation

• A

• B

• C

• D

• E

Answer explanation

Translocation refers to the movement of substances within an organism. Choices D and E correctly relate to this concept, highlighting processes involved in the transport of nutrients and genetic material.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Inversion

• A

• B

• C

• D

Answer explanation

The correct answer is C because it accurately represents the concept of inversion, which involves reversing the order of elements. Choices A, B, and D do not correctly illustrate this concept.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Translocation

• A

• B

• C

• D

Answer explanation

Translocation refers to the movement of substances within an organism. Option D correctly identifies this process, while the other choices do not accurately describe translocation.

What type of mutation is this?

• Duplication

• Inversion

• Deletion

• Translocation

• none

Answer explanation

Translocation is a type of mutation where a segment of DNA is moved from one location to another, either within the same chromosome or to a different chromosome. This distinguishes it from duplication, inversion, and deletion.

Tags

B.6E

What type of mutation is this?

• Duplication

• Inversion

• Deletion

• Translocation

• none

Answer explanation

A deletion mutation occurs when a segment of DNA is removed. This results in the loss of genetic material, which can affect gene function. In this case, the correct answer is 'Deletion'.

Tags

B.6E

is a type of chromosomal mutation when part of the chromosome breaks off and attaches to another chromosome.

• Duplication

• Deletion

• Translocation

Answer explanation

Translocation is a chromosomal mutation where a segment of one chromosome breaks off and attaches to another chromosome, distinguishing it from duplication (copying) and deletion (loss of a segment).

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Identify each type of chromosomal mutation.

• Inversion: genes are flipped

• 
• Transloc: genes swapped bet chromosomes

• 
• Duplication: gene(s) are copied twice

• 
• Deletion: genes are deleted

• 

Tags

NGSS.HS-LS3-2