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It is relatively uncommon for twins to consist of one boy and one girl, occurring in about 1 out of every 50 twin births.

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6mo ago

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Are the girl and boy twins identical or fraternal"?

The girl and boy twins are fraternal, meaning they are not identical.


If a boy and a girl are twins are they faternal twins or twins?

If a boy and a girl are twins, they are known as fraternal twins. Fraternal twins result from the fertilization of two separate eggs by two separate sperm cells, whereas identical twins result from the fertilization of a single egg by a single sperm cell that later splits into two embryos.


Can identical twins be of different sexes?

They can be. While identical twins always have to be the same gender, fraternal twins usually are not. However this is not always the case. Identical twins occur because they inhabit the same egg. Fraternal twins because two eggs were fertilized at the same time. So fraternal twins could be the same gender, but usually they are of the opposite gender.


Why is a girl a girl instead of a boy?

A girl is biologically female due to the presence of two X chromosomes, while a boy is biologically male due to having one X and one Y chromosome. These chromosomes determine the development of sex characteristics in individuals.


Which of these is an example of interaction between biotic and abiotic components of an ecosystem?

abiotic means no-living and biotic means living, or existing. Though the interaction of the ecosystem is this: The sex between a boy or a girl in a relationship.And the Biotic is the living though abiotic components of the ecosystem. Examples: A Boy would grow a girl gets develope in itest on the boy the get married and have a child. Then the child grows. Qwestion: Why do the boy and girl prepared sex?