Carrot Cake and Cup Cake are Cousins

[Phosphorous 136]

It seems apparent that Cup Cake and Carrot Cake are cousins.

 

1. They both have the same last name, and there's no reason to believe that equestria has a maritial name changing tradition. It must mean that their fathers (or mother if matronym) had the same last name. Which could be likely either if they are cousins, or if their name is a common one.
2. Earth pony families generally have their children follow the same occupation as their parents, such as the Apples being into apple farming. Both of the Cakes are into baking, which probably means each one had a parent that was a baker.
3. Their children are a pegasus and a unicorn. It is hinted that being either is rescesive. The chance of a rescessive trait showing up is exponentially higher the more the parents are related to eachother. For example, it is higher in a first cousin mariage, than a fifth cousin marriage.
4. Their common grandparents or great-grands probably had these alleles.
5. In most parts of the world, cousin marriages are normal, depending on the degree of relation. There is no reason to suspect that cousin marriages are taboo in equestrian society.

Debate.

[Daring_Do 552]

Re: 1, Equestrian ponies don't look to have last names in the way we understand them.

 

Re: 2, can you list some examples?

[Gestum 2,493]

1. Most people share the last name with their husband/wife. 

 

2. Surely there can exist two people with the same work.

 

3. There is still a chance for a rescessive trait showing up in a fifth cousin marriage.

 

4. Nope. Mr cake's great-great-great-great grandfather was a unicorn and mrs Cake's great aunt's second cousin twice removed was a Pegasus.  

 

5. And there's no reason to think that cousin marriages aren't taboo in equestrian society

[DormantAccount 308]

Well, half the families of earth ponies we know well don't perfectly follow that rule.

 

The apples do, but Pinkie's family are rock farmers.