School and Work

1) In a typical cross where a parent with a completely dominant trait is mated with a parent exhibiting a completely recessive trait, what is the expected genotypic outcome and allelic frequency for the F1 progeny? Give an example.

2) In a typical cross where hybrid F1 parents are mated, what is the expected genotypic outcome and allelic frequency of the F2 progeny? Give an example.

3) For the F2 progeny produced from a typical F1 hybrid mating, how many totally recessive individuals would be produced if the progeny total population is six offspring? What if the progeny population was 20? 50? 1,000?

4) Excluding factors such as sex-linked genes, incomplete dominance or epistasis, etc., will the above cross results vary if different organisms are used, such as dogs or tulips? Why or why not?

5) How will factors such as sex-linked genes, incomplete dominance, or epistasis, etc., affect the expected outcomes that were investigated above?

I am finishing up a report and these are the only questions I have left and I am stumped. Any help would be greatly appreciated. THANK YOU!

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Sorry, I could not read the content fromt this page.

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You are wrong in asserting that humans have more defects than animals.

One thing you must keep in mind is that being human, we are far more interested in human disease than animal disease.

There are no animals that we know as well as humans. The only ones that even come close are those that are useful for scientific or agricultural uses.

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For example, do dogs sometimes have Down Syndrome? Do random animals like crocodiles, cockroaches, or fish have Down syndrome? Would a pet dog with the disorder behave very differently from a dog that does not have the disorder.

I'm just curious :) Thanks

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