UCI BIO 93 QUESTIONS AND ANSWERS A+
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What is an example of incomplete dominance?
A red and white snapdragon making a pink offspring
What is an example of co-dominance?
Blood cells.
What is Pleiotropy?
When a gene affects more than
one phenotypic character.
What is the norm of reaction?
The range of phenotypic possibilities
What are some example of polygenic inheritance?
Skin color and height
Norms of reactions are broadest for _____________ characters
polygenic
Genetic traits in humans can be tracked through what?
Family pedigrees
What is loosely packed chromatin called?
Euchromatin
What happens in histone acetylation?
Acetyl groups are attached to histone tails
What is the purpose of histone acetylation?
To loosen chromatin structure to promote initiation in transcription.
In what gender is Igf2 expressed in?
The maternal chromosome
What does it mean for a protein to be ubiquitinated?
Ubiquitin attached to the protein and takes it to a proteasome that degrades the protein.
What does a repressor do?
Block transcription of a gene
What does an activator do?
Stimulate the transcription of a gene
What binds to the enhancers?
The activators
What are some ways that mRNA can be degraded?
shortening of poly A tail, removal of cap, nucleases chew up mRNA
What are histones responsible for?
1st level of DNA packing in chromatin
What is a region of highly condensed chromatin called?
Heterochromatin
What is cell differentiation?
The process by which cells become specialized
What is the physical process that gives the organism its shape called?
Morphogenesis
GRADED. Buy Quality Materials!
What is an example of incomplete dominance?
A red and white snapdragon making a pink offspring
What is an example of co-dominance?
Blood cells.
What is Pleiotropy?
When a gene affects more than
one phenotypic character.
What is the norm of reaction?
The range of phenotypic possibilities
What are some example of polygenic inheritance?
Skin color and height
Norms of reactions are broadest for _____________ characters
polygenic
Genetic traits in humans can be tracked through what?
Family pedigrees
What is loosely packed chromatin called?
Euchromatin
What happens in histone acetylation?
Acetyl groups are attached to histone tails
What is the purpose of histone acetylation?
To loosen chromatin structure to promote initiation in transcription.
In what gender is Igf2 expressed in?
The maternal chromosome
What does it mean for a protein to be ubiquitinated?
Ubiquitin attached to the protein and takes it to a proteasome that degrades the protein.
What does a repressor do?
Block transcription of a gene
What does an activator do?
Stimulate the transcription of a gene
What binds to the enhancers?
The activators
What are some ways that mRNA can be degraded?
shortening of poly A tail, removal of cap, nucleases chew up mRNA
What are histones responsible for?
1st level of DNA packing in chromatin
What is a region of highly condensed chromatin called?
Heterochromatin
What is cell differentiation?
The process by which cells become specialized
What is the physical process that gives the organism its shape called?
Morphogenesis
