Question

The chromosome number in meiocyte is $34$. The organism could be –
A) Apple
B) Onion
C) Dog
D) Ophioglossum

Answer 1

Chromosomes are threadlike structures which are present in the nucleus and they carry genetic information from one generation to another generation. In eukaryotes, they are present in the nucleus of the cell.

Complete answer:
Let us analyse the options and find the correct answer.
Option A: Meiocyte is a type of cell that differentiate into gametes by meiosis. The diploid meiocytes divide into four genetically different haploid gametes.
The chromosome number in meiocyte $\left( {2n} \right)$ is$34$, then chromosome number present in gametes (n) will be $17$.i.e. Meiocyte Gametes. Therefore, this is the correct option.
$\Rightarrow 2\,n = \,34$
$\Rightarrow n = \dfrac{{34}}{2}$
$\boxed{n = 17}$

Option B: In Onion the chromosome number in meiocyte is $32$. Then the number of chromosomes in gametes will be $16$. Therefore, this is the correct option.

Option C: In Dog the number of chromosomes in meiocyte is $78$, so in gametes the number of chromosomes will be $39$. Therefore, this is the correct option.

Option D: In Ophioglossum (a fern), the chromosome number in meiocyte is $1260$, then the number of chromosomes in gametes will be $630$. Ophioglossum reticulatum has the highest recorded chromosome number of any organism. Therefore, this is the correct option.

Thus, the correct answer is option (A) Apple.

Note: The function of chromosomes are,

The major function of chromosomes are to carry genetic information from one generation to another
every chromosome contains thousands of genes which precisely codes for multiple proteins which are present in the body
They protect the DNA from getting tangled and damaged