《那些古怪又讓人憂心的問題》第69期:自體繁殖(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.

愛麗絲和鮑勃的魅力染色體中都各自有一條來自於雙方父母的倍率染色體。由於兩個倍率染色體結合到一起會變成1點能力值，因而如果愛麗絲和鮑勃貢獻的都是倍率的話，他們的孩子的魅力值就會低到極致。幸好發生這種事情的機率只有四分之一。

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.

如果孩子的某個配對的染色體上顯示的都是倍率，那麼他的這一方面的能力值就會降爲1。幸好由於倍率染色體本來就比較稀少，隨機組合的過程中兩個倍率染色體配對結合到一起的機率就更低了。

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

現在我們來看看，如果愛麗絲僅用自己的身體生下一個小孩會是什麼樣子的。

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

首先她會產生一對性細胞，DNA序列隨機選取過程將會重複兩遍：

Then the selected strands would be contributed to the child:

被選中的DNA序列會形成孩子的遺傳信息：

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

孩子的性別一定是女性，因爲沒有人來貢獻Y染色體。

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.

她的孩子面臨着一個問題：7個屬性中的3個屬性——智力、敏捷和體質——繼承自兩個相同的DNA序列。對於敏捷和體質來說這不是問題，因爲愛麗絲在這兩個方面的能力值都很高。不過孩子的體質從愛麗絲那裏繼承了兩個倍率染色體，結合之後變成了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.

如果有人打算自體繁殖，這會極大增加孩子的配對染色體都繼承自同一條遺傳序列機率。在現在這種情況下，愛麗絲的孩子繼承兩個倍率染色體的機率爲58％，而如果她和鮑勃育有一個孩子的話，這個機率只有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.

總的來說，如果你用自身的細胞受精產下一個孩子，那麼有一半的機率兩個配對的染色體是相同的。如果這個相同的染色體的值是1或者是一個倍率染色體，那麼你的孩子就會有大麻煩了——即使你從未遇上過。這種兩個遺傳序列上的基因代碼都是一致的情況被稱爲純質性。