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Genetics aren't the only thing to influence when girls start their period. It's entirely possible that one twin starts her period before the other (even if they are identical).
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∙ 14y ago
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What is the difference between identical and flaternal twins?
Fraternal twins come from the fertilization of two different eggs. It can cause them to look almost the same, but they could just as easily be totally different, even different genders. Identical twins come from the splitting of only one fertilized egg, making them look exactly the same and they will always be the same gender.
Why do fraternal twins have their own placenta?
Identical twins may or may not share the same placenta . Identical twins develop when a fertilized egg splits. Depending on when the split occurs will determine if the twins share a placenta, with either one or two chorions and amnions, or if they each develop their own placentas.
Similar twins are true twins or not?
i would have to say no because i am an identical twin and when you hear twin you think of identical ones. also fraternal twins aren't really twins because they are 2 separate babies that just happened to be fertilized at the same time.
Why does identical twins not have the same weight and Skin colour?
Eye colour is caused by genetics whereas the weight of a person depends on how they life their life (how healthily they eat or how much exercise they do) so it is an environmental variation. Identical twins have the same genes so have the same eye colour.
Why might genetically identical twins have different phenotype?
This is because fraternal twins are simply two full siblings that happen to share the womb at the same time. There is no more reason for fraternal twins to be the same than there is for any brother/sister, brother/brother or sister/sister sibling set to be the same.
Do twins have to be born on the same day?
twins just have to develop in the same womb at the same period of time. When they are born has nothing to do with it.
How do you get twins on babydow?
If you want twins you either have to have to magic seeds at the same time and do them at the same time or plant to seeds on the same day and get on their everyday and you will have twins in know time!
Do you get your period on the same year on the same day as your mom?
No, you do not get your first period at the same age that your mother got her first period. Everyone develops differently and at different rates, even if you took identical twins they wouldn't reach menarche at the same time.
What do you call three children born at the same time?
when two babies are born at the same time are callled twins!
Do you start youre period the same time every month when youre on birth control?
NO IT WILL START AT DIFFRENT TIMES NOT ALWAYS ON THE SAME DATE
When you get on birth control what will it do to your period?
usually you will start the pill the Sunday after your period begins. this will regulate your period so you will get it about the same time each month
What are twins born at the same time but do not look alike called?
Fraternal twins.
Can twins be born a year appart?
No, twins are born from the same pregnancy, and at the same time give or take an hour or so.
What do you call babies born at the same time?
twins
What are two kinds of twins?
There are identical and fraternal. Fraternal twins happen when 2 different embryos start growing at the same time, so you get a brother and a sister or 2 sisters or 2 brothers that are the same age. Identical twins happen when 1 embryo splits into 2 embryos when it is only a few cells big, so both babies have the same genes.
If you have twins will they hit puberty around the same time?
It is possible,but we are all different,even twins and triplets.
What is the differences between identical twins and fraternal twins?
Identical twins arise from a single fertilized egg that for some reason split itself in two. Identical twins have exactly the same genetic make-up.Fraternal twins arise from two separate eggs. Sometimes both of a woman's ovaries will produce an egg cell at the same time. Each of these is fertilized by a separate sperm cell (of which there are always plenty) so they have different genetic make-up. They may share the same womb and be born at the same time but are no more closely related than true brothers.
