biology

__________________ charcters show many degrees of variation because they result from the additive effects of several ____________.


Many human conditions are complex because they are influenced both by ___________ and by ___________.


If two genes cross oveer 35 percent of the time, they will be ____________ map units apart on a chromosome map.


Why is hemophillia carried by females and yet rarley expressed in females?


what is a gene mutation?

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asked by brooke
  1. I can only answer some of your questions.

    Human conditions are influenced both by environment and heredity.

    Hemophilia is carried on the X chromosome. Females are very likely to have a gene for normal blood clotting on their other X chromosome, but males have no such gene on the Y. Thus females can be carriers, but males who have the gene always exhibit it in their phenotype.

    http://en.wikipedia.org/wiki/Haemophilia#Genetics

    Gene mutation is a random change in a gene.

    http://www.brooklyn.cuny.edu/bc/ahp/BioInfo/MUT/Mut.Definition.html

    In the future, for some of these you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

    I hope this helps.

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    posted by PsyDAG

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