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BIO 340: Genetics Exam III (Mangone) 118 Q&A/ Already Graded A+. $22.99
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BIO 340: Genetics Exam III (Mangone) 118 Q&A/ Already Graded A+.

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BIO 340: Genetics Exam III (Mangone) 118 Q&A/ Already Graded A+. What is a gene? - Answer: Fundamental unit of inheritance Origin of the word "gene" - Answer: greek: genos (origin), and genesis (birth) Gregor Mendel Experiment - Answer: -pea plants -traits do not blend in offspring -tra...

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  • December 8, 2024
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BIO 340: Genetics Exam III (Mangone) 118
Q&A/ Already Graded A+.
What is a gene? - Answer: Fundamental unit of inheritance


Origin of the word "gene" - Answer: greek: genos (origin), and genesis (birth)


Gregor Mendel Experiment - Answer: -pea plants
-traits do not blend in offspring
-traits are discreet, distinct entities


Prokaryotic DNA Replication - Answer: -has single origin (OriC)
-is bidirectional
-replication fork
-draw out diagram for 5', 3' directionality


Eukaryotic DNA replication is similar except: - Answer: -has multiple origins of replication

, Page 2 of 15


-more DNA
-chromosomes are linear
-RNA is complexed with proteins


Telomerase - Answer: counteracts shortening of DNA by adding repeated segments of DNA to
ends of eukaryotic chromosomes


apoptosis - Answer: -when a cell tells itself to stop dividing
-can happen with telomeres become to short despite counteraction of telomerase


Length of human DNA - Answer: 2.3 m (~7.5 ft)


Chromatin - Answer: condensed nucleoprotein, usual state of DNA


euchromatin - Answer: gene expression, uncoiled and active


heterochromatin - Answer: inactive b/c lack or have unexpressed genes
-contains both telomere and centromere


Orders and Size of Chromatin - Answer: 1. DNA double helix (2 nm)
2. Bead and String formation around histones (11 nm)
3. Chromatin packed nucleosomes (30 nm)
4. extended section of chromosome (300 nm)
5. condensed section of chromosome (700 nm)
6. metaphase chromosome (1400 nm)


"Beads on String" - Answer: to form chromatin, HI histone


Human domain - Answer: contains 2,000 looped domains

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