Question 1

The apple maggot was used as an example of allopatric speciation.

Accepted Answer

The apple maggot is an example of sympatric speciation, where new species evolve from a single ancestral species while inhabiting the same geographic region.

Question 2

Sympatric speciation often occurs in animals through polyploidy.

Accepted Answer

Sympatric speciation through polyploidy is more common in plants than in animals, as polyploidy (having more than two sets of chromosomes) is generally better tolerated in plants.

Question 3

Unreduced gametes are those that contain additional chromosome numbers.

Accepted Answer

Unreduced gametes result from a failure in meiosis, leading to gametes with the same number of chromosomes as the parent cell, thus containing additional chromosomes compared to normal reduced gametes.

Question 4

Polyploid plants are often unhealthy as compared to other plants.

Accepted Answer

Polyploid plants, which have multiple sets of chromosomes, are often more vigorous and can exhibit improved traits such as larger flowers or fruits, increased resistance to diseases, and greater overall hardiness compared to their diploid counterparts.

Quiz 18: Speciation and Macroevolution

The apple maggot was used as an example of allopatric speciation.

Sympatric speciation often occurs in animals through polyploidy.

Unreduced gametes are those that contain additional chromosome numbers.

Polyploid plants are often unhealthy as compared to other plants.