AP BIOLOGY

CELL DIVISION

CELL DIVISION AND CANCEROUS CELLS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
There are 28 chromosomes in the body cells of organism Y. How many chromosomes are there after DNA replication?
A
28
B
56
Explanation: 

Detailed explanation-1: -There are 23 pairs of homologous chromosomes, or homologues, in each cell. After replication there are a total of 92 sister chromatids in each cell. There are 46 individual chromosomes in each cell.

Detailed explanation-2: -SOLVED: An organism has 28 pairs of chromosomes in its diploid somatic cells.

Detailed explanation-3: -One molecule of DNA and one protein make up one chromosome. Chromosomes are different sizes, and proteins called histones allow them to pack up small enough to fit in a nucleus.

Detailed explanation-4: -Each of the four daughter cells will have half the number of total chromosomes as compared with the parent cell. Therefore, the daughter cell will have 282=14chromosomes 28 2 = 14 c h r o m o s o m e s .

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