Topic: Observing Polytene Chromosome
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Answers to Common Questions
How polytene chromosomes formed?
When DNA replication takes place without subsequent cell division, polytene chromosomes may result. These are giant chromosomes comprised of multiple chromatids (identical chromosome copies) arranged together like strands of a large cable. ... Read More »
Source: http://wiki.answers.com/Q/How_polytene_chromosomes_formed
What is polytene chromosome?
( ′päl·i′tēn ′krō·mə′sōm ) (genetics) A giant, multistranded, chromosome produced by multiple sounds of endoreduplication and thus composed of many copies of the parental chromosome pair having their chromomeres in register. Also known as B... Read More »
Source: http://www.answers.com/topic/polytene-chromosome
What organism has a polytene chromosome?
Drosophilia Read More »
Source: http://wiki.answers.com/Q/What_organism_has_a_polytene_chromosome
More Common Questions
Answers to Other Common Questions
A Lampbrush chromosome is the largest chromosome known, and is found in the amphibian oocytes (immature eggs). Lampbrush chromosomes occur during the diplotene stage of meiosis I. These chromosomes are producing large amounts of RNA for the...
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Source: http://answers.yahoo.com/question/index?qid=20100302051519AA0Lklq
They begin as normal chromosomes, through repeated rounds of DNA re... ...MORE...
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Source: http://www.chacha.com/question/what-do-the-giant-polytene-chromos...
The bands are achieved by repeated rounds of DNA replication withou... ...MORE...
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Source: http://www.chacha.com/question/what-are-the-various-bands-on-a-gi...
during prohase the condensed chromosomes become attached to fibers in the spindle at a point near teh centromere of each chromatin
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Source: http://wiki.answers.com/Q/Why_chromosome_observed_in_prophase_but...
The only way to develop polytene chromosomes is through DNA replication without cell division. Cells undergoing mitosis do replicate DNA but this is followed by cell division. Also a unique aspect of red blood cells is that there posses no ...
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Source: http://answers.yahoo.com/question/index?qid=20090202212833AAwNlEt
Answer because they are not directly visible durin the interphase
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Source: http://wiki.answers.com/Q/Why+is+it+difficult+to+observe+individu...
I would have to guess that Electron Microscopes were just becoming popular around that time and people had a hard time using them. Some types of staining also had not been devised during that time, which help researchers today.
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Source: http://wiki.answers.com/Q/Why_was_it_hard_to_observe_chromosomes_...
