Chromosomal Mutations

Inversion

• When a segment of a chromosome breaks off.

• When a segment of a chromosome breaks off, flips, and reattaches.

• When a segment of a chromosome is copied or doubles.

• When a segment of a chromosome breaks and attaches to a non homologous chromosome.

• When entire chromosomes don't separate evenly during meiosis.

Answer explanation

Inversion occurs when a segment of a chromosome breaks off, flips, and reattaches. This process alters the gene order within that segment, distinguishing it from other chromosomal changes.

Tags

NGSS.HS-LS3-2

Duplication

• When a segment of a chromosome breaks off.

• When a segment of a chromosome breaks off, flips, and reattaches.

• When a segment of a chromosome is copied or doubles.

• When a segment of a chromosome breaks and attaches to a non homologous chromosome.

• When entire chromosomes don't separate evenly during meiosis.

Answer explanation

Duplication refers to the process where a segment of a chromosome is copied or doubles, leading to an increase in genetic material. This is the correct definition, distinguishing it from other chromosomal changes.

Translocation

• When a segment of a chromosome breaks off.

• When a segment of a chromosome breaks off, flips, and reattaches.

• When a segment of a chromosome is copied or doubles.

• When a segment of a chromosome breaks and attaches to a non homologous chromosome.

• When entire chromosomes don't separate evenly during meiosis.

Answer explanation

Translocation occurs when a segment of a chromosome breaks off and attaches to a non homologous chromosome, leading to genetic rearrangements. This distinguishes it from other processes like duplication or inversion.

Deletion

• A

• B

• C

• D

Answer explanation

Choice A is correct because it directly addresses the concept of deletion, which is the focus of the question. The other options do not relate to the topic as clearly as A does.

Tags

NGSS.MS-LS3-1

Translocation

• A

• B

• C

• D

Answer explanation

Translocation refers to the movement of substances within an organism. Option B correctly defines this process, while the other options do not accurately describe translocation.

Tags

NGSS.HS-LS3-2

Inversion

• A

• B

• C

• D

Answer explanation

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

Tags

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

What process occurs during meiosis that can result in chromosomal disorders?

• crossing over

• non-disjunction

• anaphase I

• prophase II

Answer explanation

Non-disjunction is the failure of homologous chromosomes or sister chromatids to separate properly during meiosis, leading to gametes with an abnormal number of chromosomes, which can result in chromosomal disorders.

What type of mutation?

• Substitution

• Insertion

• Deletion

• Translocation

Answer explanation

A deletion mutation occurs when one or more nucleotides are removed from the DNA sequence. This can lead to a frameshift, altering the reading frame of the gene, which is why 'Deletion' is the correct answer.

Tags

B.6E

What type of mutation changes the structure of chromosomes?

• Multiple Point Mutations

• Chromosomal Mutation

• Structural Mutation