Podcast
Questions and Answers
Which type of mutation involves the addition of a nucleotide, leading to a shift in the reading frame and alteration of the amino acid sequence after the insertion point?
Which type of mutation involves the addition of a nucleotide, leading to a shift in the reading frame and alteration of the amino acid sequence after the insertion point?
- Point mutation
- Substitution mutation
- Deletion mutation
- Insertion mutation (correct)
A mutation in a non-coding region of DNA does not alter the amino acid sequence. What is the likely effect of this mutation?
A mutation in a non-coding region of DNA does not alter the amino acid sequence. What is the likely effect of this mutation?
- It will always result in a catastrophic disease.
- It will always result in a genetic advantage.
- It may have no observable effect on the phenotype. (correct)
- It will always affect transcription and translation.
In a monohybrid cross, if both parents are heterozygous for a particular trait (Aa), what is the probability of their offspring being homozygous recessive (aa)?
In a monohybrid cross, if both parents are heterozygous for a particular trait (Aa), what is the probability of their offspring being homozygous recessive (aa)?
- 75%
- 25% (correct)
- 100%
- 50%
A plant breeder has a plant with a dominant phenotype but an unknown genotype. Which type of cross should the breeder perform to determine the genotype of this plant?
A plant breeder has a plant with a dominant phenotype but an unknown genotype. Which type of cross should the breeder perform to determine the genotype of this plant?
In humans, blood type AB is an example of codominance. If a person with blood type A has offspring with a person with blood type B, what are the possible blood types of their offspring?
In humans, blood type AB is an example of codominance. If a person with blood type A has offspring with a person with blood type B, what are the possible blood types of their offspring?
In a pedigree diagram, what does a shaded circle typically represent?
In a pedigree diagram, what does a shaded circle typically represent?
Why are recessive sex-linked traits more commonly expressed in males than in females?
Why are recessive sex-linked traits more commonly expressed in males than in females?
In cystic fibrosis, the CFTR protein is non-functional. What is the direct consequence of its malfunction in the respiratory system?
In cystic fibrosis, the CFTR protein is non-functional. What is the direct consequence of its malfunction in the respiratory system?
How does cystic fibrosis affect the digestive system, specifically concerning the pancreas?
How does cystic fibrosis affect the digestive system, specifically concerning the pancreas?
What is the purpose of pre-implantation genetic diagnosis (PGD) in genetic screening?
What is the purpose of pre-implantation genetic diagnosis (PGD) in genetic screening?
Flashcards
Gene Mutation
Gene Mutation
A random, permanent change in DNA that can alter protein production.
Insertion Mutation
Insertion Mutation
Adds a base, shifting the reading frame forward and altering the amino acid sequence.
Deletion Mutation
Deletion Mutation
Removes a base, shifting the reading frame backward and altering subsequent amino acids.
Phenotype
Phenotype
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Genotype
Genotype
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Homozygous
Homozygous
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Codominance
Codominance
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Pedigree Diagram
Pedigree Diagram
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Sex Linkage
Sex Linkage
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Cystic Fibrosis
Cystic Fibrosis
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Study Notes
All information provided in the text was already present in the existing notes. Therefore, no updates or changes were needed.
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