Linked Genes Question

Genetics as it applies to evolution, molecular biology, and medical aspects.

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truthbetold
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Linked Genes Question

Post by truthbetold » Thu Oct 09, 2008 4:23 am

Mendel's law of independent assortment applies to genes that are on different chromosomes. However, two of the genes Mendel studied were acutally located on the same chromosome.

1. Explain why genes located more than 50 map units apart behave as though they are not linked.

They can't possibly be wanting me to answer blandly that 50 map units is too far away because that is the relative distance from the gene to the next chromosome, can it?

2. How can one determine whether these genes are linked and what the relative distance is between them?

Is this as simple as it looks? By counting the map units. 50 map units.


Thanks!

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canalon
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Post by canalon » Thu Oct 09, 2008 2:41 pm

1- crossing over is the way to the answer
2- I suspect you would need to be smart about it and rather discuss how you would use genetic to do that. If you can say how you can tell the exact distance between 2 points that are more than 7m apart when all you have is a 5m measuring tape...
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