AIPMT> How many chromosome will be found in cell...

How many chromosome will be found in cell at anaphase II if cell is diploid and have 50 chromosome:-
(1)50
(2)40
(3)100
(4)25
plz explain in detail

Sayeda Mahfuja Rahman , 7 Years ago

Grade

2 Answers

Sruthi I Mohan

Last Activity: 7 Years ago

its option (4) 25

Chromosome division in meiosis takes place only during anaphase 1

If the diploid cell had 50 chromosome,

the number of chromosome will be reduced to half in anaphase 1 and become 25.

It will remain 25 throughout the whole meiosis 1 and meiosis 2....no more division occurs.

Approved

Simran Vinaik

Last Activity: 7 Years ago

In sexual reproduction occurs Meiosis which has two stages I and II. The DNA content doubles but the number of chromosome remains same in S phase before the Meiosis I begins. So number will remain 50 before meiosis I. After meiosis I the number becomes 25. During Meiosis II the number till metaphase II will remain 25 as you know that during metaphase II, the chromosomes are lined up individually across the center of the cell. Due to the reduction division of meiosis I, there are now half as many chromosomes (and chromatids) as there were before. When anaphase II begins, however, the sister chromatids split apart, which once again doubles the chromosome number so anahase 2 the number will be 50.