Genetic Variation: Mutations
• What is genetic variation?
Genetic variation is diversity in genotypes and phenotypes of offspring.
• What is a mutation?
A mutation is any change in DNA sequencing, mutations occur because of mistake copying the DNA or by exposure to certain environmental factor.
• There are multiple types of mutations
(Addition, Deletion, Substitution, Nondisjunction)
• Every mutation is different, some mutations like down syndrome are products of nondisjunction, while things like birth defects can be caused by environmental factors like drug use or radiation.
• I learned that mutations help create genetic variation and can have a positive or negative affect on the human race. I also learned that some mutations can be a cause of the mother who is having the child or it can be genetic like a birth defect.
http://www.hhmi.org/biointeractive/damage-dna-leads-mutation (mutation video)
(Addition, Deletion, Substitution, Nondisjunction)
• Every mutation is different, some mutations like down syndrome are products of nondisjunction, while things like birth defects can be caused by environmental factors like drug use or radiation.
• I learned that mutations help create genetic variation and can have a positive or negative affect on the human race. I also learned that some mutations can be a cause of the mother who is having the child or it can be genetic like a birth defect.
http://www.hhmi.org/biointeractive/damage-dna-leads-mutation (mutation video)
Citations
"Orgins Of Genetic Variation - Geneed - Genetics, Education, Discovery". Geneed.nlm.nih.gov. N.p., 2017. Web. 12 May 2017.
"Damage To DNA Leads To Mutation | HHMI's Biointeractive". Hhmi.org. N.p., 2017. Web. 12 May 2017.
"Difference Between SNP And Mutation | SNP Vs Mutation". Differencebetween.com. N.p., 2017. Web. 12 May 2017.
I like how you gave examples of different types of mutations, not just stating how mutations occur. It was good that you added in you're reflection that mutations aren't just negative, that they can have positive impacts on life. One thing you could have added was by going more in-depth about how mutations can can change the proteins by changing one amino acid, changing multiple amino acids, or by causing a premature stop codon to show.
ReplyDeleteI like how you described the topic in detail! I like how in the reflection you pulled the blog together in a small summary of the topic, by saying it was positive and negative, and listing some causes. I think one thing you could change or add is saying that Meiosis can cause Genetic Variation and saying how Genetic Variation relates to some things
ReplyDeleteI like how your blog post is well organized. I liked that in the reflection you said that mutations can also have a positive effect on people and that they aren't always bad because when you think of mutations, you don't think positively. I feel like you could have gone more in depth with the different types of mutations (substitution, deletion, insertion, etc..)
ReplyDeleteI really liked how you were concise about a complex topic like mutations and your picture shows a very good representation of how mutations can occur. I do agree in your reflection that mothers can influence the cause of defects in their children due to a mutation that could have occurred in their sex cells causing a recessive allele but I would also add that the father would have to express the disorder for it to actually show up in the offspring. Thus, both parents influence their children's probability for sex linked mutations to show in phenotypes. As an extra info, you can also mention the specific missense mutation that involves substitution of an amino acid in a protein .
ReplyDelete