They are always in pairs, one from each parent.
http://wiki.answers.com/Q/Why_do_chromosomes_come_in_pa...
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Human Cells have a total of 46 chromosomes. But these 46 chromosomes come in pairs: each human somatic cell has 23 pairs of chromosomes. ... Human Cells have a total of 46 chromosomes. But these 46 chromosomes come in pairs: each human somatic cell has 23 pairs of chromosomes. Many other species also have their...
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www.bootstrike.com/Genetics/Intro/chromsomes_pairs.html
www.bootstrike.com/Genetics/Intro/chromsomes_pairs.html
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Chromosomes come in pairs, called Homologous Pairs (or homologs). Imagine homologs as a matching set, but they are not exacly alike, like a pair of shoes. ... Diploid cells have 23 homologous pairs = total of 46 ... When two sex cells, or gametes come together, the resulting fertilized egg is called a ZYGOTE...
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www.biologycorner.com/bio1/celldivision-chromosomes.htm...
www.biologycorner.com/bio1/celldivision-chromosomes.html
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Chromosomes are long pieces of DNA found in the center (nucleus) of cells. DNA is the material that holds genes. It is considered the building block of the human body. Chromosomes come in pairs. Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes). ... Chromosomes come in pairs.
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www.ahealthyme.com/topic/adam1002327
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Chromosomes come in pairs. Normally, each cell in the human body has 23 pairs of chromosomes (46 total chromosomes). Half come from the mother; the other half come from the father.
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www.umm.edu/ency/article/002327.htm
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These chromosomes come in pairs, where one chromosome in each pair is from the mother and one is from the father. ... In fruit flies, somatic cells have 8 chromosomes (= 4 pairs or 2 sets) and gametes have 4 chromosomes (= 1 set). Geneticists use the term “-ploid” to refer to one set of chromosomes in an organism,
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biology.clc.uc.edu/courses/bio104/mitosis.htm
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In humans, a cell nucleus contains 46 individual chromosomes or 23 pairs of chromosomes (chromosomes come in pairs, remember? 23 X 2 = 46). Half of these chromosomes come from one parent and half come from the other parent.
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kidshealth.org/kid/talk/qa/what_is_gene.html
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There are the forty-six chromosomes of human DNA. If we pull this up a little out of the way - that's it - we then need to sort these out. They come in pairs because half of them come from the mother and half from the father.
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www.channel4.com/learning/microsites/G/genetics/lecture...
www.channel4.com/learning/microsites/G/genetics/lectures/grow.html
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