A scientist want 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?

MITOSIS AND MEIOSIS

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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: -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-2: -Answer and Explanation: The process that leads to the most genetic variation in sexually reproducing organisms is crossing over. Meiosis is the process of gamete formation. During meiosis duplicated homologous chromosomes line up together during prophase I.

Detailed explanation-3: -The two events common to all sexually reproducing organisms are meiosis and fertilization. Meiosis reduces a diploid cell to a haploid state.

Detailed explanation-4: -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.

There is 1 question to complete.

AP BIOLOGY

LABORATORY REVIEW

MITOSIS AND MEIOSIS