《那些古怪又让人忧心的问题》第69期:自体繁殖(3)

Alice and Bob both had a multiplier on their paternal “charisma” chromosome. Since two multipliers together result in a stat of 1, if Alice and Bob had both contributed their multiplier, the child would have a rock-bottom CHR. Fortunately, the odds of this happening were only 1 in 4.

爱丽丝和鲍勃的魅力染色体中都各自有一条来自于双方父母的倍率染色体。由于两个倍率染色体结合到一起会变成1点能力值，因而如果爱丽丝和鲍勃贡献的都是倍率的话，他们的孩子的魅力值就会低到极致。幸好发生这种事情的几率只有四分之一。

If the child had multipliers on both strands, the stat would have been reduced to 1. Fortunately, since multipliers are relatively rare, the odds of them lining up in two random people are low.

如果孩子的某个配对的染色体上显示的都是倍率，那么他的这一方面的能力值就会降为1。幸好由于倍率染色体本来就比较稀少，随机组合的过程中两个倍率染色体配对结合到一起的几率就更低了。

Now let's look at what would happen if Alice had a child with herself.

现在我们来看看，如果爱丽丝仅用自己的身体生下一个小孩会是什么样子的。

First, she'd produce a pair of sex cells, which would run the random selection process twice:

首先她会产生一对性细胞，DNA序列随机选取过程将会重复两遍：

Then the selected strands would be contributed to the child:

被选中的DNA序列会形成孩子的遗传信息：

The child is guaranteed to be female, since there's nobody to contribute a Y chromosome.

孩子的性别一定是女性，因为没有人来贡献Y染色体。

The child also has a problem: For three of her seven stats-INT, DEX, and CON-she inherited the same chromosome on both sides. This isn't a problem for DEX and CON, since Alice had a high score in those two categories, but in CON,she inherited a multiplier from both sides, giving her a constitution score of 1.

她的孩子面临着一个问题：7个属性中的3个属性——智力、敏捷和体质——继承自两个相同的DNA序列。对于敏捷和体质来说这不是问题，因为爱丽丝在这两个方面的能力值都很高。不过孩子的体质从爱丽丝那里继承了两个倍率染色体，结合之后变成了1。

If someone produces a child on their own, it dramatically increases the likelihood that the child will inherit the same chromosome on both sides, and thus a double multiplier. The odds of Alice's child having a double multiplier are 58 percent-compared to the 25 percent chance for a child with Bob.

如果有人打算自体繁殖，这会极大增加孩子的配对染色体都继承自同一条遗传序列几率。在现在这种情况下，爱丽丝的孩子继承两个倍率染色体的几率为58％，而如果她和鲍勃育有一个孩子的话，这个几率只有25％。

In general, if you have a child with yourself, 50 percent of your chromosomes will have the same stat on both sides. If that stat is a 1-or if it's a multiplier-the child will be in trouble, even though you might not have been. This condition, having the same genetic code on both copies of a chromosome, is called homozygosity.

总的来说，如果你用自身的细胞受精产下一个孩子，那么有一半的几率两个配对的染色体是相同的。如果这个相同的染色体的值是1或者是一个倍率染色体，那么你的孩子就会有大麻烦了——即使你从未遇上过。这种两个遗传序列上的基因代码都是一致的情况被称为纯质性。