In a population of chicken, three color morphs defined by two alleles occur: dark brown with genotype BB, light brown with genotype Bb, and white with genotype bb. A breeder takes only the light brown chickens for a new breeding group and then let the chickens select their partners. If […]

1.) A certain Drosophila protein-coding gene has one intron. If a large sample of null alleles (null alleles are mutations that destroy the function of the protein) of this gene are examined, will any of the mutant sites be expected in thea) exons?b) introns?c) promoter?d) intron-exon boundary?Please justify your answers. […]

Suppose that in Drosophila melanogaster an XXY female with white eyes (due to the w^1 allele on both copies of an attached X chromosome) is mated with a male that has a yellow body (due to the y allele on the X chromosome). Which of the following best describes the […]

Calculate the free energy change of pumping Ca+2 from the cytosol, where its concentration is about 1.0 x 10-7 M, to the extracellular fluid, where its concentration is about 1.0 mM. Assume a temperature of 37oC and a transmembrane potential of 50 mV (inside more negative) for the plasma membrane. Calculate the […]