3. One different between a point mutation and a chromosomal mutation is that
A. A point mutation affects the DNA of more genes than a chromosomal mutation
B. A point mutation can involve a insertion or deletion, but cannot result in a frameshift
C. A chromosomal mutation can change the number of chromosomes in a cell.
D. A chromosomal mutation is more likely to be passed on to offspring or Daughter cells.
I really don't know. Please help? Thx
The correct answer is C. A chromosomal mutation can change the number of chromosomes in a cell.
A point mutation is a type of mutation that involves a change in a single nucleotide base in DNA. It can occur due to substitutions, insertions, or deletions of nucleotides, and it usually affects only one gene or a small region within a gene. Point mutations can result in different types of changes, such as silent mutations (no change in the amino acid sequence), missense mutations (changes the amino acid sequence), or nonsense mutations (introduces a premature stop codon).
On the other hand, chromosomal mutations involve changes in the structure or number of chromosomes. These mutations can include deletions, duplications, inversions, or translocations of entire chromosomal segments. Chromosomal mutations can have significant effects on gene function or regulation, as they can alter the organization and arrangement of genes on the chromosome. In some cases, chromosomal mutations can lead to changes in the number of chromosomes, such as aneuploidy (an abnormal number of chromosomes), which can be observed in conditions like Down syndrome (trisomy 21).
So, the main difference between a point mutation and a chromosomal mutation is that chromosomal mutations can alter the number of chromosomes in a cell, while point mutations usually only affect a single gene or a small region of a gene.
Sure! Let's break down the options to determine the difference between a point mutation and a chromosomal mutation:
A. A point mutation affects the DNA of more genes than a chromosomal mutation: This is incorrect. In fact, a chromosomal mutation typically affects more genes than a point mutation. This is because a chromosomal mutation involves changes in the structure or number of entire chromosomes, which can impact multiple genes at once.
B. A point mutation can involve an insertion or deletion but cannot result in a frameshift: This is also incorrect. A point mutation refers to a change in a single nucleotide within the DNA sequence. It can involve substitutions, insertions, or deletions, and depending on the specific change, it can result in a frameshift mutation. A frameshift mutation alters the reading frame of the genetic code, which can change the entire sequence of amino acids encoded by the gene.
C. A chromosomal mutation can change the number of chromosomes in a cell: This is correct. A chromosomal mutation can lead to changes in the structure, number, or arrangement of chromosomes within a cell. This can include deletions, duplications, inversions, or translocations, among other types of alterations.
D. A chromosomal mutation is more likely to be passed on to offspring or daughter cells: This is also correct. While both point mutations and chromosomal mutations can occur in somatic cells (non-reproductive cells), chromosomal mutations have a higher chance of being passed on to offspring or daughter cells. This is because chromosomal mutations affect larger sections of DNA, which can be inherited by the next generation.
Therefore, the correct answer is:
C. A chromosomal mutation can change the number of chromosomes in a cell.
Funny how you gave the sites but still don't have an answer..
Since this is not my area of expertise, I searched Google under the key words "chromosomal mutation vs point mutation" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=point+vs.+chromosomal+mutation&ie=UTF-8&oe=UTF-8&gws_rd=ssl#q=chromosomal+mutation+vs+point+mutation
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
http://www.hackcollege.com/blog/2011/11/23/infographic-get-more-out-of-google.html