Question

Drosophila gametes contain 4 chromosomes. A single Drosophila nuclear area in metaphase I contains ____ chromosomes and ___ sister chromatids.
Answer
a.
4; 0
b.
8; 16
c.
8; 0
d.
4; 8

Answer 1

@Abhisar

Answer 2

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Answer 3

8,0

Answer 4

ummmm Why 0? they are not split apart yet...

Answer 5

still intact

Answer 6

No, it occurs in Anaphase I

Answer 7

It's a gamete = Meiosis not mitosis...

Answer 8

Anaphase 2 where they are split apart, Anaphase I when homologs are split apart.

Answer 9

So u mean to say Anaphase I is not possible in meiosis ?

Answer 10

Sister chromatids are intact during Anaphase I, they are never split in Anaphase I, only anaphase 2 in meiosis.

Answer 11

In Anaphase I sister chromatids are formed but they remain attached at centromere

Answer 12

this does not means that u cant count them as sister chromatids.

Answer 13

Once they are detatched they are no longer chromatids

Answer 14

They will be counted as chromosomes

Answer 15

...................

Bro in Anaphase I homologs seperate..... sister chromatids are still intact.....

Answer 16

Anaphase I begins when the two chromosomes of each bivalent (tetrad) separate and start moving toward opposite poles of the cell as a result of the action of the spindle.

Answer 17

Also the sister chromatids are formed and remains attached at the centromere

Answer 18

http://prntscr.com/3saevk

Answer 19

OMG...sorry for that i mentioned the wrong option i think, it will be d

Answer 20

I was xplaining correct but mentioned the wrong option \(\color{green}{\huge\ddot\smile}\)

Answer 21

thank you, I was thinking it was D also, making sure lol.