Sex Differences in Behavior: Sex Determination and Differentiation

5 important questions on Sex Differences in Behavior: Sex Determination and Differentiation

What is the Red Queen hypothesis?

is an evolutionary hypothesis which proposes that organisms must constantly adapt, evolve, and proliferate not merely to gain reproductive advantage, but also simply to survive while pitted against ever-evolving opposing organisms in an ever-changing environment. The Red Queen hypothesis intends to explain two different phenomena: the constant extinction rates as observed in the paleontological record caused by co-evolution between competing species[1] and the advantage of sexual reproduction at the level of individuals

What is the cryptic female choice process?

The ability to store and separate sperm from multiple males enables females to manipulate paternity by choosing which sperm fertilize their eggs

What is ment by mammalian sexual differentiation: endocrine regulation ?

sexual differentiation mediated through organisational and activational effects of gonadal hormones.

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What determine the sex of a reptile?

The primordial gonad in reptiles consists of distinct cortical and medullary tissue. If the Corical portion develops -> ovary..

Depends on temperature.  

What two types of sequential hermaphrodites are there?

Animals that begin life as one sex, then change as adults because of different factors. Protogynous: femals->male, protandrous: male->female. 

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