hsc multiple choice question HELP! (1 Viewer)

[Angel_a]

[FONT=&quot]A micrograph of a dividing cell from a mouse showed 19 chromosomes, each consisting of two sister chromatids. the haploid gametes produced by this mouse would contain which one of the following chromosome numbers? [/FONT]
[FONT=&quot]a) 76 [/FONT]
[FONT=&quot]b) 38 [/FONT]
[FONT=&quot]c) 19 [/FONT]
[FONT=&quot]d) 10 chromosomes in the male gametes and 9 chromosomes in the female gametes[/FONT]




The answer is c) 19. but i don't get why...
isnt it that the 19 chromosomes, each with two sister chromatids, is the diploid number?


thanks in advance = )

 

[razzle_red]

which paper is it from? cant you look up the marking criteria for it?

 

[fayad158]

c/ as each with two sister chromatids (diploid number) would produce haploid cells each with 19 single strands

 

[Angel_a]

i thought the diploid number of chromosomes replicate during the early stages to form two sister chromatids? or it only occurs in meiosis not mitosis?...



i saw this question when i was studying for my half yearly and i forgot what year is it from...
i only copied down the question and answer.

 

[ibbi00]

Bump: how would you answer this one?

 

[fullonoob]

haploid gametes are produced after the division process
http://www.le.ac.uk/ge/genie/vgec/images/meiosis_II_males.png

 

[sinophile]

The question is sort of ambiguous. At what stage of division is it at?