Topic: Why Are Polytene Chromosomes Important
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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
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Why Are Polytene Chromosomes Important
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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
Chromosomes are important because they contain directions for how cells operate. For example, the X- and Y-chromosomes tell an embryonic cell whether the organism will be male or female.
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Source: http://answers.ask.com/Science/Biology/why_are_chromosomes_import...
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...
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
Hi ali-- The first use of polytene chromosomes in Drosophila is their use as genetic markers in which the chromosomal inversions are considered alleles and are utilized to examine gene flow and other population genetic parameters. The secon...
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Source: http://en.allexperts.com/q/Genetics-1795/polytene-chromosome.htm
