A naturalist is visiting an island in the middle of Lake Superior and observes a new bird species with three distinct types of beaks. Those with short crushing beaks (BB) feed on oak nuts; those with long delicate beaks (bb) pick the seeds from pine cones; and those with intermediate beaks (Bb) feed on both oak nuts and pine cones. (Note: because their beaks are structurally & functionally inadequate, few Bb offspring successfully reach adulthood). Let’s assume that this difference in beak morphology is the result of incomplete dominance in a single gene. In a year in which most of the food available on the island is in the form of hard oak nuts, which of the mated pairs below will produce the most offspring that will be able to survive to adulthood? Use Punnett squares to back up your answer. List all phenotypes and genotypes. a.) Bb x Bb b.) Bb x bb c.) BB x Bb d.) BB x bb
A naturalist is visiting an island in the middle of Lake Superior and observes a new bird species with three distinct types of beaks. Those with short crushing beaks (BB) feed on oak nuts; those with long delicate beaks (bb) pick the seeds from pine cones; and those with intermediate beaks (Bb) feed on both oak nuts and pine cones. (Note: because their beaks are structurally & functionally inadequate, few Bb offspring successfully reach adulthood). Let’s assume that this difference in beak morphology is the result of incomplete dominance in a single gene. In a year in which most of the food available on the island is in the form of hard oak nuts, which of the mated pairs below will produce the most offspring that will be able to survive to adulthood? Use Punnett squares to back up your answer. List all
a.) Bb x Bb
b.) Bb x bb
c.) BB x Bb
d.) BB x bb
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