Question

Choose the correct option.
$\begin{array}{ccc}\text{Organism}& \text{Chromosome number in meiocyte}& \text{Chromosome number in gamete}\\ \text{Housefly}& A& \text{06}\\ \text{Cat}& \text{38}& B\\ \text{Rice}& \text{24}& C\end{array}$

• A. A-6, B-19, C-23
• B. A-12, B-38, C-12
• C. A-11, B-19, C-24
• D. A-12, B-19, C-12

Answer 1

The correct option is D A-12, B-19, C-12

In diploid organisms, specialised cells called the meiocytes undergo meiosis (reductional division) to give rise to the gametes. This is generally seen in pteridophytes, gymnosperms, angiosperms and most animals including human beings. Therefore if the chromosome number in meiocyte is 2n (where n represents a single set of chromosomes in an organism’s genome), then the chromosome number in the gamete will be n.

$\begin{array}{ccc}\text{Organism}& \text{Chromosome number in meiocyte(2n)}& \text{Chromosome number in gamete(n)}\\ \text{Housefly}& \text{12}& \text{06}\\ \text{Cat}& \text{38}& \text{19}\\ \text{Rice}& \text{24}& \text{12}\end{array}$