The Appalachian mountain range is an ancient example of a collision between two continental plates. Both plates have low density and little subduction occurs between them.

North American Cordillera: B. Terrane accretion

These form when two continents that collided bonded so tight that it forms a permanent land mass. If the continents would pull away from each other, the terrane stays intact.

Aleutian plate: D. Oceanic convergence

This is a type of convergence where one plate subducts beneath another plate. Between the two, the older plate is usually the one that subducts because it is usually more dense.

Andes mountain range: C. An oceanic plate and continental plate colliding.

In the collision between an oceanic and continental plate, the thinner and more dense oceanic plate subducts under the continental plate. The Andes mountain range was formed by the subduction of the Nazca Plate beneath the South american Plate.

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In foxes, silver-black coat color is governed by a recessive allele (b) and red color by its dominant allele (B), Determine the

MaRussiya [10]

Answer:

a. Genotype ratio= 1/2 BB: 1/2 Bb

Phenotype ratio= All red

b. Genotype ratio= 1/2 Bb: 1/2 bb

Phenotype ratio= 1/2 red: 1/2 silver black

c. Genotype ratio= All Bb

Phenotype ratio= All red

Explanation:

a. pure red x carrier red:

Genotype of parents: pure red (BB) x carrier red (Bb)

Genotype ratio of progeny= 1/2 BB: 1/2 Bb

Phenotype ratio of progeny= All red

b. carrier red x silver-black

Genotype of parents: carrier red (Bb) x silver-black (bb)

Genotype ratio of progeny= 1/2 Bb: 1/2 bb

Phenotype ratio of progeny= 1/2 red: 1/2 silver black

c. pure red x silver black

Genotype of parents: pure red (BB) x silver black (bb)

Genotype ratio of progeny= All Bb

Phenotype ratio of progeny= All red

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