Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian Islands have different elaborate courtship rituals. These rituals involve fighting other males and making stylized movements that attract females. What type of reproductive isolation does this represent?

(A) habitat isolation

(B) temporal isolation

(C) behavioral isolation

(D) gametic isolation.

Short Answer

Expert verified
  1. The term "habitat isolation" is false.
  2. The term "temporal isolation" is false.
  3. The term "behavioral isolation" is true.
  4. The term "gametic isolation" is false.

Step by step solution

01

Drosophila

Drosophila falls under the category of a holometabolous insect. They possess various characteristic features such as a round head, large and red-colored compound eyes.

They also possess short antennae and three smaller simple eyes. It is acknowledged that the size of the femaleDrosophila is somewhat larger than the male Drosophila.

02

Explanation of option '(A)'

Habitat isolation happens when habitat inclinations reduce the possibility of reproducing amongst individuals connected with different habitats. In this form of isolation, there are no rituals of fighting with other males to attract females.

Thus, the term habitat isolation refers to the state when two species could not interbreed due to the species living in diverse areas.

Therefore, the given term is false.

03

Explanation of option '(B)'

Temporal isolation falls under the category of reproductive isolation. Temporal isolation occurs when two or more species get involved in the process of reproduction at various times.

Thus, temporal isolation indicates the state of reproduction at diverse times.

Therefore, the given term is false.

04

Explanation of option '(C)'

Behavioral isolation falls under the category of the prezygotic barrier. This form of isolation stops breeding amongst closely interrelated species. The reason is that there is no companion acknowledgment amongst females and males of the diverse species

Thus, behavioral isolation stops breeding amongst closely interrelated species.

Therefore, the given term is true.

05

Explanation of option '(D)'

Gametic isolation also falls under the category of the prezygotic barrier. In this form of isolation, the gametes like egg and sperm exhibit their contact, but fertilization does not occur.

Thus, the gametic isolation does not indicate the rituals of fighting with other males for attracting females.

Therefore, the given term is false.

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Most popular questions from this chapter

Summarize key differences between allopatric and sympatric speciation. Which type of speciation is more common, and why?

In sexually reproducing species, each individual inherits DNA from both parent organisms. In a short essay (100–150 words), apply this idea to what occurs when organisms of two species that have homologous chromosomes mate and produce (F1) hybrid offspring. What percentage of the DNA in the F1 hybrids’ chromosomes comes from each parent species? As the hybrids mate and produce F2 and later-generation hybrid offspring, describe how recombination and natural selection may affect whether the DNA in hybrid chromosomes is derived from one parent species or the other.

Make a scatter plot to help you visualize any patterns that might indicate a relationship between the variables. Plot the independent variable on the x-axis and the dependent variable on the y-axis. (For additional information about graphs, see the Scientific Skills Review in Appendix F and the Study Area of MasteringBiology.)

Which of the following factors would not contribute to allopatric speciation?

(A) The separated population is small, and genetic drift occurs.

(B) The isolated population is exposed to different selection pressures than the ancestral population.

(C) Different mutations begin to distinguish the gene pools of the separated populations.

(D) Gene flow between the two populations is extensive.

Speciation can occur rapidly between diverging populations, yet the time between speciation events is often more than a million years. Explain this apparent contradiction.

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