I'm working on a planetary colonization story where a crew of 36 women are sent to populate an earth-like planet.
The crew takes with them the tools needed to survive the first years. Enough to build the first houses and to plant the first fields, and a huge sperm bank, capable of storing thousands of sperm samples for centuries.
Each sample comes from a different donor, and the donors have been selected to optimize genetic diversity.
These samples are separated in two groups:
- group A contains only sperm with an X sexual chromosome
- group B is evenly distributed between X and Y
The colonists will start by using samples form the group A for a few generations, then samples from group B for one generation, and finally switch to regular reproduction methods.
With a fertility rate of 3 children/woman, the first generation will see the birth of 108 girls, the second 324, etc.
I want to keep the all-female phase under 200 years, but not endanger the life or well-being of the colonists. With 3 all-female generations and one mixed, we'll have 2916 both male and female children to continue the colonization process.
I'm assuming this is enough, but we can add as many generations as it takes.
All of this will be carefully prepared before launching the mission, including a set of cultural tools (like the language) which will be developed by a team of sociologists, anthropologists, linguists, and every useful expert possible.
My questions are:
Knowing the last person who had ever seen a man died decades before the birth of the first boy, how difficult will the transition be? How will the social order be impacted?
How should the first colonists shape the culture of their descendants (it can be through legends, traditions, rituals, songs, language, beliefs, etc. ) to ease this transition?
Edit based on the comments:
Colonizing a planet and starting a civilization from scratch is hard work. In this scenario, all the workers are also single mothers, and raising children is very time consuming.
I assumed they'll start having kids at 25 to give them enough time to build their home, reclaim fields from nature and conduct exploration missions.
Also, having to many kids with little medical care is a serious health hazard, so I think it's best not to over-do it.
Of course, not every women will have exactly 3 children, most will, but some will have more, and some will die young. 3 children/woman is the fertility rate for the entire colony.
I'm also thinking about setting this rate even lower (2.5, maybe only 2 children/woman). A slow and steady colonization seems preferable to me than a rushed one with a high mortality rate.
I'm not sure on the number of all-female generations, it depends on the minimum size the population needs to be to avoid inbreeding.
To give you an idea on how many years will pass between the landing and the first boy :
It takes 3+1 generations to have 2913 children, and 5+1 generations to have 26244. If the colonists have their first child 5 years after landing (to build the first village, secure the food supply, explore the surrounding region, etc.) and their daughter have theirs at 25, it will take between 80 years (3+1 generations case) and 155 years (5+1 case) for the first boy to be born.
Edit based on an answer:
About the first colonist culture: The language, social structure, stories and rituals will be created back on earth specially for this mission. The first colonist will learn them (they may be specially raised for this purpose, so they can learn as much as they need before leaving), and pass all this to their children and grand-children.
It's not about what could happen if we send a crew of multicultural people, but about what this created culture should be to keep the colony stable.
Apart from the super-sperm-bank, the first 36 colonist only bring the tools they need to start over. These tools will serve a few decades, maybe a couple of generations, but then the colony will end up at as a rural economy, with access only to pre-industrial technology.
They also don't live in a ship, but in the houses they build with their own hands.