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You have found a sex-limited gene that codes for male color in a Lake Victoria cichlid fish species. The dominant (R) allele codes for a red color and the recessive (r) allele codes for a greenish color.
a) As you examine different populations of this species, you find that the R allele predominates in some populations and r allele predominated in others. Give two possible reasons for these difference.
b) Are the two reasons you have given mutually exclusive? That is, does one rule out the other?
c) What kind of selection would cause the female fish in the red-male and greenish-male populations to have behave differently?
d) Design an experiment to test whether there really are differences among females in their behavior towards the males in the two types of population.
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If the alleles of the pea color gene (Y,y) and the pea shape gene (R,r) did not assort independently and instead the alleles inherited from a parent always stayed together as a unit?
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Describe the following characteristics of biological membranes, use clearly labelled diagrams to illustrate explanations:
A black guinea pig mated with a white guinea pig produces only black offspring. If many of those offspring are mated together and produce an aggregate of 64 pigs, how many of the litter should be black?
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