Question

Which human cells never have 23 pairs of chromosomes?

A. blood cells <----------
B. nerve cells
C. mature sex cells
D. mutant cells

I THINK A< DOES ANYONE ELSE AGREE?? I WILL GIVE MEDAL

Answer 1

@sleepyjess

Answer 2

I think a, because we have a ton of blood cells in our body

Answer 3

i do not know the exact number, but i know it is higher than 23 :)

Answer 4

I'm not really sure, I think @pooja195 is better at this stuff :)

Answer 5

@pooja195

Answer 6

thats right sex cells can have 23 which can lead to down sydrome non of the others can either so your correct

Answer 7

oh, so a, but you say sex cells @pooja195 , so that would leave me with c, plz explain this

Answer 8

nerve cells are diploid, that means they have a full set of chromosomes (23 pairs, so 46 chromosomes total)

We need a haploid cell, which always have only 1 chromosome of those pairs. so 23 total
blood cells do not always have 23 pairs of chromosomes, red blood cells do not have chromosomes at all. But white blood cells do. So we can eliminate A
Mutant cells CAN have more or less than 23 pairs or chromosomes, but that doesn't say they never have 23 PAIRS. Because most mutant cells do have 23 pairs of chromosomes.
sex cells are always haploid. So when 2 sex cells of a male and a female come together, you have 23+23 = 46 chromosomes, so 23 pairs.

Answer 9

also these questions belong in biology

Answer 10

oh, so a

Answer 11

right?

Answer 12

nope read again it is NOT a

Answer 13

OH< OPPS I MEAN C :P

Answer 14

yep