The answer to this question would be: 24 chromosomes
In G1 phase, the cell is preparing for a division. The chromosome is not duplicated yet, make the number of chromosomes will be same as normal diploid cells. That means the number of chromosomes in the cell at G1 phase will be same as normal cells.
The chromosome will be duplicated in S phase which was the phase after G1.
They are called constraints.
The answer is play on words, or a pun - a row of large animals separating two yards is called an elefence.
The first part of the word, ele-, obviously refers to elephants, which are large animals. The second part is a fence, which separates two yards. So this is intended to have a humorous effect.
