From the following list, identify the types of chromosome changes you expect to show phenotypic consequences.
Terminal deletion

Question

From the following list, identify the types of chromosome changes you expect to show phenotypic consequences. duplication

Accepted Answer

Hello, everyone and welcome to today's video. So which of the following genetic mutations will not show any phenotypic change? Well, in order to solve this problem, let's go over each of our answer choices and analyze each of the mutations that are presented to us and determine which ones will not show any phenotypic change. Let's begin by answer choice. A we have these interstitial deletions, duplication and terminal deletions. Well, as it turns out, all of these mutations are going to affect this structure of the chromosome very heavily resulting in gain or loss of genetic material will, which will definitely show in the phenotype of the organism. Therefore, we're going to cancel out this answer choice. Moving on. We have answer choice. B, we have a trisomy, a monosomy and polyploid. Well, these are what we call numerical chromosomal abnormalities. So they're going to affect the number of chromosomes that the organism has. Again, this is going to affect in the gain or loss of genetic material and therefore, therefore, will definitely affect the phenotype of the organism. So we are also going to cancel this out. Finally, we have the which states nonsense m mis sense and friendship mutations. Well, this nonsense and mis sense, these are going to be types of point mutations and this friendship mutation is going to be a type of mutation such as an insurgent or a deletion. Now, all of these types of mutations are going to affect the sequence of DNA and therefore will also affect proteins once this DNA is translated. Therefore, the proteins being affected will have an effect on the phenotype of the organisms. As these proteins are the ones that are going to specify this phenotype. So we're also going to cancel out answer choice. D so as answer choice C which is our only remaining answer choice, we have intro neutral and synonymous mutations. All these intro mutations are going to occur in non coding regions of a gene. And these neutral and synonymous mutations are going to be mutations that have no effect on the DNA sequence either by changing a nucleotide for the same one or for a nucleotide that still codes for the same protein resulting in no change to the phenotype. Therefore, our correct answer choice here is going to be answer choice. C, intro, neutral and synonymous mutation. I really hope this video helped you and I hope to see you on the next one.

From the following list, identify the types of chromosome changes you expect to show phenotypic consequences. duplication

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Key Concepts

Chromosome Duplication

Phenotypic Consequences

Genetic Imbalance