3b. In hybrid A what are the large loops seen on the top strand of DNA? What are the smaller loops seen on both strands of DNA? Explain your reasoning.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Using a computer algorithm that searches for sequence similarities in other organisms, you discover
that hexose kinase is a highly conserved gene that is expressed by many species, both prokaryotic
and eukaryotic. The most closely related prokaryotic homolog of hexose kinase has a protein
sequence in which 90% of the amino acids are identical to those of the human version of the gene.
3. To learn more about their similarity at the DNA level, you obtain segments of the genomic DNA
coding for the hexose kinase gene in both humans and this prokaryotic species. After combining
both DNA samples, you heat them to denature the DNA strands and then allow them to cool and
reanneal. Finally, you examine the DNA hybrids you obtain under the electron microscope.
Transcribed Image Text:Using a computer algorithm that searches for sequence similarities in other organisms, you discover that hexose kinase is a highly conserved gene that is expressed by many species, both prokaryotic and eukaryotic. The most closely related prokaryotic homolog of hexose kinase has a protein sequence in which 90% of the amino acids are identical to those of the human version of the gene. 3. To learn more about their similarity at the DNA level, you obtain segments of the genomic DNA coding for the hexose kinase gene in both humans and this prokaryotic species. After combining both DNA samples, you heat them to denature the DNA strands and then allow them to cool and reanneal. Finally, you examine the DNA hybrids you obtain under the electron microscope.
Hybrid A
top strand
Hybrid B
bottom strand
Hybrid C
3b. In hybrid A what are the large loops seen on the top strand of DNA? What are the smaller loops
seen on both strands of DNA? Explain your reasoning. -
Transcribed Image Text:Hybrid A top strand Hybrid B bottom strand Hybrid C 3b. In hybrid A what are the large loops seen on the top strand of DNA? What are the smaller loops seen on both strands of DNA? Explain your reasoning. -
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