Answer:
Has three dominant alleles
Explanation:
Skin colour is a polygenetic inheritance and it is controlled by three genes pairs of alleles. The human skin is determined by the amount of melanin it contains. A combination of melanin producing alleles determines the skin color.
In the above question, the person has a skin color that is midway meaning only half of the alleles produced melanin. The total number of alleles is 6 and half of it is 3. So, only 3 alleles were dominant and the remaining three were recessive.
Crater lake was produced when a stratovolcano collapsed, creating the crater.
Answer:
Characteristics:
They are bilaterally symmetrical. They are triploblastic, which three layers. They show organ system grade of organisation. The body is soft and unsegmented. Body is divisible into three regions – head, a visceral mass, and ventral foot. Body is covered by a mantle and shell. Mollusks interact with eachother differently. The deliberate production of sound is used to attract mates, ward of predators, locate prey, and in social communication. Of course there needs to be recipients to hear and interpret the sound. ... Sound and vibration detection is known also in molluscs. On the tentacles of gastropods sensory cells can detect vibration.