Chapter 10: Sexual Behavior

This set of flashcards covers key concepts from Chapter 10 on Sexual Behavior, focusing on the role of genes, neurons, and hormones in mating strategies across species, particularly in Drosophila.

What influences mating success in Great Bowerbirds?

Illusions promote mating success in Great Bowerbirds.

What are male-specific and female-specific pheromones?

They are chemical signals that influence mating and aggression in sexual behavior.

What genetic element is essential for sexual behavior in Drosophila?

The Fruitless (Fru) gene is essential for many aspects of sexual behavior.

What does the organization-activation model of sex hormone action describe?

It describes how sex chromosomes and hormones influence sexual behavior.

What behaviors does the male anglerfish exhibit?

The male anglerfish shows specific mating behaviors to attract females.

What is the role of sex chromosomes in sexual behavior?

Sex chromosomes contribute to the biological and physiological differences in sexual behavior.

Which neurons promote male courtship behavior in Drosophila?

Fru+ neurons are critical for promoting male courtship behavior.

How can females express male-specific behaviors?

By expressing male-specific FruM protein, females can engage in male courtship behavior.

What sensory modalities play a role in Drosophila courtship?

Visual, auditory, olfactory, gustatory, and somatosensory modalities are involved.

What happens to male fruit flies lacking the Fruitless gene?

They form courtship trains with other males instead of females.

What effect does activating Fru+ neurons have in males?

Activating Fru+ neurons increases male courtship behaviors.

What are P1 neurons responsible for?

P1 neurons integrate multi-sensory and motivational cues to control male courtship.

What does the expression of male-specific FruM in females result in?

It allows females to exhibit male courtship behavior.

How is female receptivity to courtship affected by pC1 neurons?

Activating pC1 neurons increases receptivity, while silencing decreases it.

What happens to P1 neurons in female Drosophila?

Programmed cell death normally removes P1 neurons from female brains.

What factors can modify innate behaviors in Drosophila?

Experience can modify innate courtship behaviors.

What is the significance of the Dsx gene?

Dsx regulates sexually dimorphic neuronal numbers and wiring.

What type of chemical receptors are present in Fru+ neurons?

Fru+ neurons can express specific receptors like cVA, which is a male hydrocarbon pheromone.

What aspect of neural circuitry is studied in sexual dimorphism?

The development of neural circuitry specific to male and female behaviors.

What behavior changes were observed over 4 days in mating?

Courtship behavior changes in response to the number of females present.

What is the effect of temperature on Fru neuron activity?

Temperature-sensitive silencing can affect Fru neuron activity and consequently courtship behavior.

What is the relationship between Fru neurons and sensory cues?

Fru neurons integrate sensory cues to guide mating behavior.

Why is the pC1 neuron significant in female Drosophila?

It plays a crucial role in integrating sensory information for mating.

What is the function of the GAL4 binding site?

It is used to target gene expression to specific neuronal cell types.

What is the outcome of activating Fru+ neurons in a headless male Drosophila?

Activating Fru+ neurons can still elicit courtship behavior.

What is the importance of multi-sensory integration in mating?

It allows for a more robust and adaptive response to potential mates.