In what way is clinal variation exhibited in animals?
What will be an ideal response?
ANSWER: Clinal variation usually results from gene flow between nearby populations when each
population is adapting to slightly different conditions. When a species is distributed over a
large, environmentally diverse area, some traits may exhibit a cline, a smooth pattern of
variation across a geographical gradient. For example, many birds and mammals in the
northern hemisphere show clinal variation in body size and the relative length of their
appendages. In general, populations living in colder environments have larger bodies and
shorter appendages.
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One hope of personalized medicine is that:
A. physicians will be able to use an individual's genotype to identify the most effective medication for that patient. B. physicians will be able to use an individual's lifestyle factors to identify the most effective medication for that patient. C. it will lead to treatments that are more widely useful across genotypes. D. it will lead to medications with fewer sideeffects. E. it will lead to preventative treatments for diseases for which each individual is uniquely at risk.
All of the following are correct about treating viral diseases except
A. viruses are killed by the same antibiotics that kill bacteria. B. many antiviral drugs cause severe side effects. C. interferons show potential for treating and preventing viral infections. D. many antiviral drugs block viral replication. E. All of these choices are correct.
A condition called ____________________ results in individuals having both male and female sexual structures at different times in their lives
Fill in the blank(s) with correct word
Roberts Syndrome is an extremely rare genetic disorder that is characterized by mild to severe prenatal retardation or disruption of cell division, leading to malformation of the bones in the skull, face, arms, and legs. Shown below is a pedigree for a family with Robert’s Syndrome. Based on this pedigree Roberts Syndrome is inherited as a(n) ___________ trait?
A. autosomal dominant
B. autosomal recessive
C. sex-linked dominant
D. sex-linked recessive
E. random