they were the first to discover the structure of DNA
There are two primary types of twins, Identical and Fraternal.
Identical twins occur when the egg splits after fertilization. To date no indication of a genetic link has been found. Anyone has a chance, though small, of having identical twins.
Fraternal twins occur when more than one egg is dropped during ovulation. This trait can be inherited from the mother's side of the family. Studies have shown that the chances are also increased by being overweight or older.
Regular cycles = same day/same flow.This last months was super light, barely any collections in the pads, only time I saw anything was when I would go to the bathroom. Tested already but negative - possibly to soon. Am going to the docs tomorrow to find out what is going on with me.
AnswerI not sure if i understand you right. Now from what I got from your question is. Last month your period was super light and this month you just start spotting. Ok lets say that you have had your period every 26, 27, 28, days of the month how every long your cycle is and your last period was super lite. Where you late when you started your super lite period and when you started spotting where you also late. If yes to both of these question and you had sex without a condom it could be possible take a pregnancy test.Regular = you have your period every 26, 27, 28 days of the month. That means day one of flow counts as the first day. EX If your period came on Aug 21, 2006 and you are on a 26 day cycle you should have received your period on Sep 15, 2006. You do not flow the same way every cycle some months flow is heavy than others verse lighter other months. sometimes you might not have a flow but when you go to the bathroom you have blood if that not normal for you I understand going to the doctor.
If a person has a gene for lets say diabetes then it will be passed on to the next generation through reproduction. even if a person does not have diabetes but carries the gene for it the next generation might carry on too.
A substance that causes a mutation <<< apexx
It is any agent (such as, chemical) that is responsible for mutation, typically a genetic mutation.
A mutagen is a substance which increases the frequency of mutation in a plant or animal population, which can lead to a variety of consequences. When DNA is copied, damage can be caused by physical and chemical agents know as Mutagens