No. Nobody looks the same because of environmental factors, even if their DNA is identical.
But: If both of the parent-twins were identical, than the DNA of the children of both married couples would be as similar as the DNA of siblings. The cousins would not look the same, but would look more alike than most cousins look.
No, its not compulsory or obvious. Even they will have twins is not sure
The phenomena of having twins is depend upon two things
a) either the zygote is divided in two
b) or two spern fuse to two ova
both are the cases of chance and is not always happen.
Still they can have twins if this chance phenomena occured in their mating too.
They will probably look like brother and sister similar but with slight differences.
Actually, they have nearly the same chance as other parents. However, they may have hyper ovulation in which the feminine parent will release more than one egg.
They will probably look like brothers and sisters.
yes
no
I donβt Know
They may look alike, but they will never have the same fingerprints, because fingerprints are created by differences of thickness in the dermal layer. It is independent of genetics, therefore, twins will never have identical fingerprints and any similarities between twins fingerprints would merely be coincidental.
Even identical twins are heterozygous for many alleles. Recombination would produce gametes with many different combinations of those alleles in each individual. Their offspring, as a result, could have very different genotypes than either parent, and thus look different as well.
Twins who are of the opposite sex or do not look alike are fraternal twins ~ not identical. This means that at the time of their conception ~ two eggs were fertilised. In the case od identical twins, one egg is fertilised and split in half.
a similar but not identical combination of genes.
Because they have similar, but not identical, combination of genes.
Acctually, they're children would not look like twins. But all of their children would look like brothers and sisters.
Children never look exactly alike unless they are identical twins. Even identical twins often have some differences in their looks, their fingerprints differ, and they may have scars or other features that look different.
They may look alike, but they will never have the same fingerprints, because fingerprints are created by differences of thickness in the dermal layer. It is independent of genetics, therefore, twins will never have identical fingerprints and any similarities between twins fingerprints would merely be coincidental.
Even identical twins are heterozygous for many alleles. Recombination would produce gametes with many different combinations of those alleles in each individual. Their offspring, as a result, could have very different genotypes than either parent, and thus look different as well.
(Person that asked the question)-Once twins are born, and old enough to determine whether they are identical or fraternal, how do you know if they are identical, or just fraternal twins that look identical? I was just curious.
Yes. Fraternal twins don't look alike at all. Identical, meaning to look the same, are well, identical.
I dont think there is such a thing as paternal twins...perhaps you are thinking of fraternal twins. In that case, they are not identical twins, they do not look the same and they can be different sexes.
Because the mother identical twins each have a different husband . . . half of his characteristics show up in their babies.
Identical twins look exactly alike.
The DNA of identical twins and of clones is, apart from random, environmentally produced mutations, 100% identical. The only difference is that clones are produced on purpose through advanced bioengineering techniques while identical twins happen as an accident of nature. Identical twins are, in a sense, natural clones.
Twins who are of the opposite sex or do not look alike are fraternal twins ~ not identical. This means that at the time of their conception ~ two eggs were fertilised. In the case od identical twins, one egg is fertilised and split in half.
Paternal Non-Identical fraternal twins