AP BIOLOGY

ANIMAL REPRODUCTION AND DEVELOPMENT

ASEXUAL REPRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Fission begins in a prokaryote when the DNA molecule is ____
A
destroyed
B
copied
C
split
D
enhanced
Explanation: 

Detailed explanation-1: -Prokaryotic cells, which include bacteria, undergo a type of cell division known as binary fission. This process involves replication of the cell’s chromosomes, segregation of the copied DNA, and splitting of the parent cell’s cytoplasm.

Detailed explanation-2: -Before binary fission occurs, the cell must copy its genetic material (DNA) and segregate these copies to opposite ends of the cell.

Detailed explanation-3: -Reproduction in prokaryotes is asexual and usually takes place by binary fission. The DNA of a prokaryote exists as as a single, circular chromosome. Prokaryotes do not undergo mitosis; rather the chromosome is replicated and the two resulting copies separate from one another, due to the growth of the cell.

Detailed explanation-4: -Binary fission is a type of asexual reproduction typically observed in prokaryotes and a few single-celled eukaryotes. In this method of asexual reproduction, there is a separation of the parent cell into two new daughter cells.

Detailed explanation-5: -The single, circular chromosome exists in a region of cytoplasm called the nucleoid. Occurs through binary fission. As the chromosome is replicated, the two copies move to opposite ends of the cell by an unknown mechanism. FtsZ proteins assemble into a ring that pinches the cell in two.

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