AP BIOLOGY

HEREDITY

MUTATIONS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
____ is a chromosomal mutation that removes an entire chunk of code.
A
Translocation
B
deletion
C
inversion
D
substitution
Explanation: 

Detailed explanation-1: -A deletion changes the DNA sequence by removing at least one nucleotide in a gene. Small deletions remove one or a few nucleotides within a gene, while larger deletions can remove an entire gene or several neighboring genes. The deleted DNA may alter the function of the affected protein or proteins.

Detailed explanation-2: -A deletion, as related to genomics, is a type of mutation that involves the loss of one or more nucleotides from a segment of DNA. A deletion can involve the loss of any number of nucleotides, from a single nucleotide to an entire piece of a chromosome. National Human Genome Research Institute.

Detailed explanation-3: -Frameshift mutations arise when the normal sequence of codons is disrupted by the insertion or deletion of one or more nucleotides, provided that the number of nucleotides added or removed is not a multiple of three.

Detailed explanation-4: -In the case of deletion mutations, one nucleobase is removed from the DNA sequence usually during DNA replication. Frameshift: this type of mutation occurs as a result of deletion point mutations.

Detailed explanation-5: -It is a type of frameshift mutation characterized by the loss of one or more nucleotides from the segment of DNA. Example of deletion mutation is DiGeorge syndrome. DiGeorge syndrome is a disorder caused due to the deletion of a small segment of chromosome 22.

There is 1 question to complete.