genetics

you have performed a genetic cross, and in the final results, you get 3/4 dominant phenotype and 1/4 recessive phenotype. what other info would you need to know to determine if the characteristics is normal or sex influenced? in addition explain why you would need this info.

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http://www.google.com/search?q=genetic+crosses&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Once YOU have come up with attempted answers to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to critique your work.

=)


a) need to know what species b/c some have more than 2 sex
b) need to know if its all females, all males, or a mix of the two in the group
c) the breakdown of each in both of the phenotypes

am i on the right track with this?

yes, and also you need to know if the traits are governed by more than one genetic loci

genetic loci? what do you mean by that?

some traits you observe are more complicated that Dd, they have two loci, DdEd , or worse, many more. You probably are dealing with one loci, if you havent studied more. One trait I am familar with in Honeybees requires 13 loci, the same trait in humans is one loci.

oh ic. thanks. can you help me with the reasoning to my answers? i always have difficulty explaining =T

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