Interpret the pedigree in the accompanying figure by describing each symbol and number. How might the information from this pedigree be used by clinicians and researchers?
What will be an ideal response?
A square symbolizes a male and a circle a female. Each generation is identified by a Roman numeral (I, II, III, and so on), and each individual within a generation is identified by an Arabic number (1, 2, 3, and so on according to birth order). Pedigrees are often constructed after a family member afflicted with a genetic disorder has been identified. This individual, known as the proband, is indicated on the pedigree by an arrow and the letter P.
A pedigree contains information that can help establish how a trait is inherited and identify those at risk of developing or transmitting the trait; it is also a resource for establishing biological relationships within a family. Analysis of the information in the pedigree using the principles of Mendelian inheritance can determine whether a trait has a dominant or recessive pattern of inheritance.
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Species interactions between members of a community include __________ and __________, in
which one species benefits at the expense of another. Fill in the blank(s) with the appropriate word(s).
Cocaine binds competitively with the dopamine reuptake transporter
____________________ Indicate whether the statement is true or false.
Plants, as prey, can't run away from their predators, but they can defend themselves. Is the predatory nature of Venus flytraps a defense mechanism, or does it serve some other purpose?
What will be an ideal response?
A major difference between gymnosperm and angiosperm seeds is that:
A) gymnosperm seeds are not surrounded by fruit. B) gymnosperm seeds are haploid. C) angiosperm seeds are haploid. D) angiosperm seeds are larger. E) gymnosperm seeds are larger.