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Q. Two alleles determine flower color in the plant Datura: P determines purple; and p, white. The P locus is on the smallest chromosome, number 3. In plants trisomic for this chromosome, n + 1 pollen is never functional, and only half the n + 1 eggs are functional. Suppose […]

Anakin with a genotype of A/O RhD+/- has fraternal twins (Luke and Leia) with Padme, whose genotype is A/O RhD-/-. Luke and his uncle Owen have never had their blood type tested. Leia has her blood typed and it is A RhD+. Luke is an HLA-A1/HLA-A2 heterozygot. Leia is an […]

Cell Organelles Worksheet Complete the following table by writing the name of the cell part or organelle in the right hand column that matches the structure/function in the left hand column. A cell part may be used more than once. Structure/Function Cell Part 1.      Stores material within the cell   […]

In the wild, male house finches (Carpodus mexicanus) vary considerably in the amount of red pigmentation in their head and throat feathers, with colors ranging from pale yellow to bright red. These colors come from carotenoid pigments that are found in the birds’ diets; no vertebrates are known to synthesize […]