Question

 Which cell show here can produce daughter cells with only 2 chromosomes? 

Answer 1

We know a cell has 2n number of chromosomes. Also, "n" is the number of chromosomes in an haploid set. There are two haploid sets and these sets are identical to each other morphologically,physiologically and genetically.So, every chromosome has a homologous partner.

In a cell out of the two sets one is of paternal origin and other of the maternal origin.

We also know that in a meiotic division where the cell divides to form daughter cells with only one set of chromosome, only one chromosome from each homologous pair enters into the daughter cell.

In this case:

In diagram " A" there are 4 chromosomes forming 2 homologous pair and they can form 2 cells with 2 chromosomes each ( having one from each pair)

But in "B" no two chromosomes are same...hence it cannot undergo successful meiosis.

Answer: (first option) A only.