AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a cell has completed the first meiotic division and is just beginning meiosis II, which of the following is an appropriate description of its contents?
A
it has half the chromosomes but twice the DNA of the originating cell
B
it has half the amount of DNA as the cell that began meiosis.
C
It is identical in content to another cell from the same meiosis
D
it has one-fourth the DNA and one-half the chromosomes as the originating cell.
Explanation: 

Detailed explanation-1: -If a cell has completed the first meiotic division and is just beginning meiosis II, which of the following is an appropriate description of its contents? It has half the amount of DNA as the cell that began meiosis.

Detailed explanation-2: -Two haploid cells are the end result of the first meiotic division. The cells are haploid because at each pole, there is just one of each pair of the homologous chromosomes. Therefore, only one full set of the chromosomes is present.

Detailed explanation-3: -However, Meiosis I begins with one diploid parent cell and ends with two haploid daughter cells, halving the number of chromosomes in each cell. Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells, maintaining the number of chromosomes in each cell.

Detailed explanation-4: -At the end of meiosis II, we form special sex cells called gametes. This process ensures that these gametes only contain one set of chromosomes. They get their other set of chromosomes when they are fertilized by another gamete.

Detailed explanation-5: -The correct sequence is: Synapsis

There is 1 question to complete.