EVERYDAY SCIENCE

SCIENCE

CELL BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a sequence of genes on a chromosomes is changed from ABCDEFG to GFEDCBA is
A
Deletion
B
Inversion
C
Translocation
D
Addition
Explanation: 

Detailed explanation-1: -Inversions. An inversion occurs when a chromosome breaks in two places; the resulting piece of DNA is reversed and re-inserted into the chromosome. Genetic material may or may not be lost as a result of the chromosome breaks.

Detailed explanation-2: -An inversion mutation is one type of mutation. Inversion mutations occur when a section of DNA breaks away from a chromosome during the reproductive process and then reattaches to the chromosome in reversed order.

Detailed explanation-3: -Inversions are a special type of mutation in which a piece of chromosomal DNA is flipped 180 degrees. For an inversion to occur, two breaks occur in a chromosome, the region between the breaks gets inverted, and the ends of the region get rejoined to the rest of the chromosome.

Detailed explanation-4: -Answer and Explanation: A chromosome’s gene sequence that was ABCDEFG before damage and ABCFG afterward is an example of: c) deletion.

There is 1 question to complete.