What are homologous chromosomes? - Yahoo! Answers


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** What are homologous chromosomes? **

and contrast the genetic make-up of "sister" chromatids with "non-sister"

this is a question on my biology homework, and my teacher never went over
meiosis or any of

Source: answers.yahoo.com/question/index?qid=20091202201306AAWnk9c

what are homologous chromosomes

Homologous chromosome - Wikipedia, the free encyclopedia


** Homologous chromosome **

From Wikipedia, the free encyclopedia
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This article *needs additional citations for verification*. Please help
improve this article by adding citations to reliable sources. Unsourced
material may be challenged and removed. /(November 2012)/

*Homologous chromosomes* (also called *homologs* or *homologues*) are
chromosome pairs of approximately the same length, centromere position, and
staining pattern, with genes for the same characteristics at corresponding
loci. One homologous chromosome is inherited from the organism's mother;
the other from the organism's father.^[1] They are usually not identical,
but carry the same type of information. Although when mitosis is occurring
the daughter chromosomes are carrying exactly the same genetic make up. The
product of this is an identical cell- this does however not refer to the
occasion where a mutation is occurring.

Karyogram showing chromosome pairs of a human female

In diploid (2n) organisms, the genome is composed of homologous
chromosomes. One chromosome of each homologous pair comes from the mother
(called a maternal chromosome) and one comes from the father (paternal
chromosome). Homologous chromosomes are involved in the process of meiosis
in which they cross over.

Homologous chromosomes are similar but not identical. Each carries the same
genes in the same order, but the alleles for each trait may not be the
same. In garden peas, for example, the gene for pod colour on the maternal
chromosome might be the yellow allele; the gene on the homologous paternal
chromosome might be the green allele.

Chromosomes are made of two sister-chromatids, and the chromatids are
attached by centromeres


1. *^* Reece, Jane; Campbell, Neil (2002). /Biology/. San Francisco:
Benjamin Cummings. ISBN 0-8053-6624-5. 

Stub icon /This biology article is a stub. You can help Wikipedia by
expanding it./


Source: en.wikipedia.org/wiki/Homologous_chromosome

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