Phenotype percentages from a genetic cross with linkage problem

ehd123

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8 years ago

Phenotype percentages from a genetic cross with linkage problem

What are the phenotypes of individuals and their percentages resulting from a genetic cross between AaBbCc x aabbcc where A and B are absolutely linked?

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bio_man

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Educator

8 years ago

Hi Ehd123,

Did you find out how to do this?

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ehd123 Author

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8 years ago

Not yet =(

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B.Sc in Biology
M.Sc Neuroscience
PhD. Candidate in Neuroscience

duddy

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Staff Member

8 years ago

Since the linked genes don't separate, only 2 types of gametes can be produced. This makes the punnett square much easier to write out.

Let's say you have the genotype ET/et. That means they are both hybrids, BUT they have only 2 types of gametes: ET and et. So instead of a 4 by 4 punnett square, you get a 2 by 2 punnett square:

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