TaroLover <tarolove at interserve.com.hk> wrote:
>My student is a twin, he has a right curved thumb and left straight
>thumb. But his elder btother has a left curved thumb and right
>straight thumb. But their father and mother are both right straight
>thumb and left straight thumb.
>How to explain the above event?
>Would any Biology experts can answer my question, please send me a
>E-mail. Thank You! :)
well, i'm no biology 'expert', but i've done some analysis. the
first question for you is are these twins monozygotic or
not ? it makes a big difference to the question/answer...
Iain.
