The success of altruistic behavior hinges on the ability to distinguish kin from unrelated individuals. Hamilton proposed that an allele that produces a distinctive trait (i.e
, the greenbeard effect), along with altruistic behavior directed at the bearers of this trait, could drive such an altruistic allele to high frequencies in a population. This scenario has been discovered and studied in ________. A) black-tailed prairie dogs
B) red squirrels
C) Belding's ground squirrel
D) slime molds
D
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Many breast cancers involve mutations in the BRCA1 gene. Explain the difference between sporadic
and familial breast cancer caused by this gene at a molecular level.
What will be an ideal response?A benign tumor is a condition in which tumor cells __________.
A. remain confined to their original site B. have an unusual number of chromosomes C. migrate from the initial site of transformation to other organs or tissues D. invade the circulatory system
Which of the following is an example of dendrochronology?
A) measuring seedling recruitment B) counting juveniles in a population C) measuring finger bone size over time D) counting tree rings
What are the possible gamete genotypes of an organism that has the genotype HhTt if the two genes are located on separate chromosomes and therefore not linked?
What will be an ideal response?