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Why do chromosome mutations occur most often during nuclear divisions?
Wiki User
∙ 12y ago
Chromosome mutations occur during nuclear division because when the sequence of nucleotides are being placed substitutions, and frameshifts can occur, causing mutations. Substitution is when one nucleotide replaces another and frameshift mutation is when a nucleotide deletes, causing codons to be incorrectly read.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoYes. because substitutions occur, where frameshift and other mutations can happen due to a change in nucleotides.
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What event during interphase must occur for the cell to be capable of undergoing future divisions?
each chromosome must be duplicated
How does polymerase prevent mutations?
It checks DNA for errors during replication.
Which event occurs during prophase-?
the chromatin condenses into thick thread like structure that later becomes chromatids. [ the spindle fibers form ]
Which two factors provide the genetic basis for variation within a species?
mutations and sexual reproduction (due to random orientation of bivalents about the equatorial spindle during metaphase I and pairs of chromatids during metaphase II; fusion of male and females gametes during fertilization; and reciprocal crossing over)
Can Mutations can spontaneously occur during DNA replication?
Yes
What event during interphase must occur for the cell to be capable of undergoing future divisions?
each chromosome must be duplicated
Many chromosome mutations result when chromosomes fail to separate properly during what?
Meiosis, specifically during anaphase I and anaphase II. This is known as nondisjunction and it causes aneuploidy, such as trisomy 21
When do chromosome form?
The DNA-protein complex, called chromatin usually folds into characteristic formations called chromosomes. Each chromosome contains a single double stranded piece of DNA. Chromosomes are clearly seen during nuclear division.
What is a genetic deletion?
A portion of chromosome containing some genetic information is deleted during nuclear division. this is called genetic deletion.
What is metaphase plate?
A disc extending across the nuclear area on which the chromosomes are found at the meraphase just prior to separation of the chromosome during mitosis.
What leads to genetic variation in a population?
Random mutations in an organism's DNA after reproduction.what lead to variations
What can happen if chromosome mutations are pass on to future generations?
Mutations that can be passed on to future generations must be present in the gametes. The mutation of heterochromia in which a person has one blue and one brown eyes is present in the chromosome of the mother or father and passed to the offspring.
Mutations in DNA often occur during replication During which phase of the cell cycle do such mutations occur?
Interphase
How does polymerase prevent mutations?
It checks DNA for errors during replication.
During which phase of the cell cycle do chromatids form?
When a single chromosome is replicated, two sister chromatids are produced. After cell division, each of the chromatids is a chromosome for the daughter cell.
How many divisions occur in meiosis?
Meiosis does in fact divide twice, once in meiosis I (cytokinesis) and meiosis II (cytokinesis) basically it divides into four daughter cells at the end of meiosis. Two from meiosis I and four in meiosis II
What chromosome is affected during Wilson's disease?
Chromosome 13
