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11-Dec-2019 08:12

Because humans inherit mitochondrial DNA only from the mother's ovum, genetic studies of the female line tend to focus on mitochondrial DNA.Whether or not a child is considered female does not always determine whether or not the child later will identify themselves that way (see gender identity).In particular, previously common terms such as office girl are no longer widely used.Conversely, in certain cultures which link family honor with female virginity, the word girl is still used to refer to a never-married woman; in this sense it is used in a fashion roughly analogous to the obsolete English maid or maiden.

The word girl originally meant "young person of either sex" in English; The term girl is sometimes used colloquially to refer to a young or unmarried woman; however, during the early 1970s feminists challenged such use because the use of the word to refer to a fully grown woman may cause offence.

The breast evolved from the sweat gland to produce milk, a nutritious secretion that is the most distinctive characteristic of mammals, along with live birth.

In mature women, the breast is generally more prominent than in most other mammals; this prominence, not necessary for milk production, is probably at least partially the result of sexual selection.

Most women have the karyotype 46, XX, but around one in a thousand will be 47, XXX, and one in 2500 will be 45, X.

This contrasts with the typical male karotype of 46, XY; thus, the X and Y chromosomes are known as female and male, respectively.

The word girl originally meant "young person of either sex" in English; The term girl is sometimes used colloquially to refer to a young or unmarried woman; however, during the early 1970s feminists challenged such use because the use of the word to refer to a fully grown woman may cause offence.

The breast evolved from the sweat gland to produce milk, a nutritious secretion that is the most distinctive characteristic of mammals, along with live birth.

In mature women, the breast is generally more prominent than in most other mammals; this prominence, not necessary for milk production, is probably at least partially the result of sexual selection.

Most women have the karyotype 46, XX, but around one in a thousand will be 47, XXX, and one in 2500 will be 45, X.

This contrasts with the typical male karotype of 46, XY; thus, the X and Y chromosomes are known as female and male, respectively.

The term woman is usually reserved for an adult, with the term girl being the usual term for a female child or adolescent.