There is no such thing as paternal twins, only fraternal and identical twins. Fraternal twins develop when two separate eggs are fertilized, while identical twins develop when a single fertilized egg splits into two.Know More
Fraternal twins result when two different eggs are fertilized by two different sperm in a single pregnancy. Despite developing and being born at the same time, fraternal twins are no more genetically similar than any other set of siblings. Fraternal twins are equally as likely to be the same sex or opposite sexes.
Identical twins, sometimes mistakenly known as paternal twins, result when a single fertilized egg splits into two separate embryos. Identical twins share the same set of DNA and, thus, are always the same sex unless there is a mutation during development. Despite having identical DNA, these twins do not always appear exactly the same. This is because many physical features are influenced as much by the environment as genetics. For instance, one twin might weigh more than the other. Even fingerprints have an environmental component to their development; identical twins share very similar fingerprints, but they are not an exact match.
There is a rare third type of twin: polar body or semi-identical twins. These twins share the same DNA from their mother, but have different DNA from their father. The exact mechanism by which this occurs is not fully understood.Learn more about Parenting
The word "maternal" refers to a mother and the word "paternal" refers to a father. Specifically, maternal describes a characteristic that pertains to being a mother and paternal describes a characteristic that pertains to being a father.Full Answer >
Negative reinforcement seeks to promote a desirable behavior by removing an aversive stimulus while positive punishment seeks to stop an unwanted behavior by applying an aversive stimulus. In order to be effective, both forms of conditioning must be consistent and the stimuli must be adequately adapted to the behavior in question.Full Answer >
There is no such thing as an iPhone 4g, there are only the iPhone 4 and 4s models; the term 4g refers to a fourth generation cellular network. A 4g network, which has speeds of up to 1 gigabit per second download and 500 megabits per second upload, is faster than its previous model, the 3g, which has speeds of up to 14.4 megabits per second download and a 5.8 megabits per second upload.Full Answer >
Paternal and maternal twins, commonly known as fraternal and identical twins, are distinguished by the different ways the multiple pregnancy begins. Identical twins begin as a single zygote that splits into two or more developing embryos. Fraternal twins are usually the result of multiple eggs being present for fertilization.Full Answer >