Lecture 16: Spermatogenesis and Male Reproductive Strategies

Flashcards covering key concepts from the lecture on spermatogenesis and male reproductive strategies.

What is spermatogenesis?

The process of sperm cell development in males.

What is the primary reproductive strategy of C. elegans?

One Spot, One Shot.

How do salmon reproduce?

Using the 'All Together' method.

What are undifferentiated spermatogonia?

The initial germ cells localized in the gonad that proliferate.

What happens during meiosis in spermatogenesis?

Meiosis and post-meiotic differentiation occur further along the tubule.

What is the significance of retinoic acid (RA) in spermatogenesis?

It acts as a morphogen required for periodic differentiation of spermatogonia.

What is the duration of the spermatogenesis cycle in mice?

Approximately 42 days.

What triggers spermatogenesis in seasonal breeders?

Changes in day length affecting melatonin production.

What is the 'Continual' reproductive strategy?

A method employed by mammals to generate a constant supply of sperm throughout life.

Define morphogenesis.

The development of morphological traits.

What is a key adaptation of male germ cells in salmon before spawning?

They differentiate all at once.

How do long-day breeding animals like mares respond to increased daylight?

Their spermatogenesis is promoted due to decreased melatonin levels.

What is the role of somatic cells in the embryonic gonad?

They organize into tubules that contain evenly distributed primordial germ cells.