You are examining a human pedigree for a trait. You notice that the trait appears in every generation; is equally likely to occur in males and females; and, when one parent is affected, about half of his/her offspring are affected
The trait is most likely:
A. dominant.
B. recessive.
C. epistatic.
D. produced by multiple alleles.
E. incomplete penetrance.
A
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In an aquatic microbial community where a photoautotroph, chemoorganoheterotroph, and nitrogen fixing bacterium are present, predict an environmental perturbation that would cause only one to be outcompeted by the other two groups and explain how each group would respond
What will be an ideal response?
Which group has six legs and two antennae?
a. crustaceans c. spiders b. insects d. horseshoe crabs
Progeria is a genetic disorder that causes numerous symptoms that resemble premature aging in patients. Progeria is caused by a dominant allele, and it always results in fatality before sexual maturity. Which of the following statements must be true about progeria?
What will be an ideal response?
Which protist group possess a crystalline rod in their flagella?
a. ciliates b. diatoms c. euglenoids d. water molds e. zooxanthellae