A scientist wants to change the DNA of a sexually reproducing organism and have the new DNA present in every cell of the organism. In order to do this after fertilization, she would change the DNA in which of the following?

CELL DIVISION AND CANCEROUS CELLS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	zygote
B	placenta
C	testes of the father
D	ovaries of the mother

Explanation:

Detailed explanation-1: -The two events common to all sexually reproducing organisms are meiosis and fertilization. Meiosis reduces a diploid cell to a haploid state.

Detailed explanation-2: -sexual reproduction, the production of new organisms by the combination of genetic information of two individuals of different sexes. In most species the genetic information is carried on chromosomes in the nucleus of reproductive cells called gametes, which then fuse to form a diploid zygote.

Detailed explanation-3: -All sexually reproducing organisms develops from single cell called zygote. Zygote is formed by fusion of male and female gamete. Traits from male and female parent are present in the zygote.

Detailed explanation-4: -This checkpoint, also called the restriction checkpoint, takes place between the G1 and the S phase. The cell verifies that it is large enough to divide, that its DNA is intact, and if there is enough access to nutrients and stimulating growth factors.

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