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UCI BIO 93 Final Exam Questions And Accurate Solutions
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UCI BIO 93 Final Exam Questions And Accurate SolutionsIncomplete dominance - what is it? Answer A red and white snapdragon making a pink
offspring
Co-dominance - what is it? Answer Blood cells.
Pleiotropy - what is it? Answer When a gene affects more than
one phenotypic character.
Norm of reaction - what is it? Answer The range of phenotypic possibilities
Example of polygenic inheritance Answer Skin color and height
Norms of reactions are broadest for _____________ characters Answer polygenic
Genetic traits in humans can be tracked through what? Answer Family pedigrees
What is loosely packed chromatin called? Answer Euchromatin
What happens in histone acetylation? Answer Acetyl groups are attached to histone
tails
What is the purpose of histone acetylation? Answer To loosen chromatin structure to
promote initiation in transcription.
In which gender is Igf2 expressed in? - Answer The maternal chromosome
, What happens when a protein becomes ubiquitinated? - Answer Ubiquitin attached to
the protein and takes it to a proteasome that degrades the protein.
What does a repressor do? - Answer Block transcription of a gene
What does an activator do? - Answer Stimulate the transcription of a gene
What binds to the enhancers? - Answer The activators
What are some ways that mRNA can be degraded? -Answer shortening of poly A tail,
removal of cap, nucleases chew up mRNA
What are histones responsible for? -Answer 1st level of DNA packing in chromatin
What do you call a region of highly condensed chromatin? -Answer Heterochromatin
What is cell differentiation? -Answer The process by which cells become specialized
What is the physical process that gives the organism its shape called? - Answer
Morphogenesis
What are cytoplasmic determinants? - Answer Substances in the egg that influence
early development
What is induction? - Answer The process that allows cells in the embyro to communicate
with the cells around them.
What is determination? - Answer Commits a cell to its final state
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