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Biology 18 Online
OpenStudy (anonymous):

What is gene crossing?

OpenStudy (cathyangs):

i believe it is when you cross the genes of one organism with another, like hybridization.

OpenStudy (cathyangs):

For example, some companies specialize in crossing flowers...I've seen a yellow (I think) spotted flower that was bred from a spotted white flower and a yellow flower. This new flower was considered a hybridization, and was called the leopard orchid or something.

OpenStudy (blues):

I think it's when genetic information is exchanged from one chromosome to another.

OpenStudy (blues):

Homologous chromosomes line up side by side and swap chromosome arms, basically.

OpenStudy (geometry_hater):

Remember the punnet square? Its like that were gene chromosomes are passed from the parents to offspring there it determines what the offspring will develop from the parents

OpenStudy (blues):

Genetic recombination, guys!

OpenStudy (cathyangs):

I thought that that was a different term...like prophase one of meiosis. I suppose that could be 'gene crossing' too.

OpenStudy (cathyangs):

I would think that gene crossing is referring to punnet squares...

OpenStudy (blues):

Crossing over refers only exchange of genetic material between homologous chromosomes. It has nothing to do with plant hybridization, in my opinion anyway.

OpenStudy (geometry_hater):

Punnet square is just determining the result of gene crossing its not gene crossing itself

OpenStudy (cathyangs):

wouldn't it be crossing the genes of two plants together?

OpenStudy (blues):

It doesn't have anything to do with Punnett squares, either. Although if part of a chromosome gets exchanged in a gene crossing event, it might affect the allele ratios seen in various crosses. Actually, those problems are the bane of graduate students in classical genetics....

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