A person with hemophilia lacks the pleiotropic gene that codes for the protein called clotting factor VIII. What effects will this have on a person with hemophilia?
A) The person will only have the symptom of lack of blood clotting (bleeding).
B) The person will always have the same symptoms as other hemophiliacs.
C) The person will have many other symptoms in addition to excessive bleeding.
D) The person will always have neurological problems.
C
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Genetic imprinting is caused by ____
a. insertion of a nucleotide into an exon b. deletion of an amino acid from the mRNA strand c. a frameshift mutation d. epigenetic changes to DNA e. a change in a termination codon
Why do scientists insert their DNA of interest into the middle of the lacZ coding sequence?
a. It makes the bacteria resistant to the antibiotic. b. It provides a way for researchers to sort the bacteria that have the cloning plasmid from the bacteria that don't have the cloning plasmid. c. It aids scientists in developing new antibiotic treatments. d. It provides a way for sorting bacteria that have the gene of interest from the bacteria that just have an "empty" cloning plasmid. e. It makes the bacteria produce more clones.
Using the chi-square test for goodness of fit, how many degrees of freedom are in this data set?
A dihybrid testcross is made to determine if genes C and D are linked. The results are shown in the table.
A) 1
B) 2
C) 3
D) 4
Aposematic, or warning coloration, serves to protect an animal or plant by signaling to potential ________ to stay away.
A. competitors B. predators C. mates D. rivals