Below is a pedigree of a human genetic disease in which solid color indicates affected individuals. Assume that the disease is caused by a gene that can have the alleles A or a. What is/are the possible genotype(s) of person 3?
A) AA
B) Aa
C) Either AA or Aa
D) aa
E) Cannot be determined
D) aa
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Which of the following is an example of convergent evolution?
A. the blue whale and a chimpanzee both being mammals B. two different populations of humans having different amounts of pigmentation C. the African population possessing the sickle trait in areas where malaria is prevalent D. Europeans and Africans developing lactose tolerance separately after the domestication of cattle E. the African population possessing the sickle trait and the mutation in the G6PD gene in areas where malaria is prevalent
You discover a fungus that only makes sexual spores (no asexual spores). The spores are made in
groups of four on the tips of club-shaped structures. Into which group should you classify this fungus?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
The extraordinary accuracy of the DNA polymerase III enzyme lies in its ability to "proofread" newly synthesized DNA, a function of the enzyme's __________
A) 3?-to-5? exonuclease activity B) 5?-to-3? exonuclease activity C) 3?-to-5? polymerase activity D) 5?-to-3? polymerase activity E) 3?-to-5? helicase activity
Mehran heard that drinking a high protein supplement after football training would improve his muscle mass. To test his hypothesis, the experimental group would receive a high protein drink and the control group would drink only water
Who should be selected for the control group in this experiment? A) randomly selected teammates who are given only small amounts of a protein drink B) randomly selected teammates in training who are given a placebo instead of a protein drink C) volunteers from the general campus population who are not given any protein drink D) volunteers from the football team who agree to take a placebo instead of a protein drink