This discussion is closed.
Kvothe the Arcane
Badges: 20
Rep:
?
#2521
Report 6 years ago
#2521
(Original post by Swizzle13)
Does 4 daughter cells in meiosis undergo mitosis afterwards (probably a silly question but I'm confusing myself?)


Posted from TSR Mobile
No. The 4 daughter cells produced contain half the number of chromosomes.
As such, they are usually the gametes of sexually reproducing organism and two gametes from each parent fuse.
0
denteddental
Badges: 20
Rep:
?
#2522
Report 6 years ago
#2522
(Original post by Swizzle13)
Does 4 daughter cells in meiosis undergo mitosis afterwards (probably a silly question but I'm confusing myself?)


Posted from TSR Mobile
Meiosis and mitosis are 2 different things. They do not mix.
Mitoses produces diploid cells and mitosis produces haploid cells. They are 2 different things.
0
Dinvan
Badges: 0
Rep:
?
#2523
Report 6 years ago
#2523
Does anyone have the mark scheme to Jan 2013 paper?!


Posted from TSR Mobile
0
BarryIsMyName
Badges: 0
Rep:
?
#2524
Report 6 years ago
#2524
(Original post by Simran Mars Foster)
Can someone just remind in terms of DNA, which bases have 3 hydrogen bonds and which bases have a singular ring structure?
Pretty sure you don't need to know either.


Posted from TSR Mobile
0
denteddental
Badges: 20
Rep:
?
#2525
Report 6 years ago
#2525
(Original post by Simran Mars Foster)
Can someone just remind in terms of DNA, which bases have 3 hydrogen bonds and which bases have a singular ring structure?
A-T 2 hydrogen bonds.

C-G 3 hydrogen bonds.
0
Swizzle13
Badges: 0
Rep:
?
#2526
Report 6 years ago
#2526
(Original post by reubenkinara)
No. The 4 daughter cells produced contain half the number of chromosomes.
As such, they are usually the gametes of sexually reproducing organism and two gametes from each parent fuse.
I originally thought this thanks! (Sometimes too much revision can be confusing)


Posted from TSR Mobile
0
VigneshSB
Badges: 0
Rep:
?
#2527
Report 6 years ago
#2527
Say they gave us a species, and told us that they showed varying characteristics, and asked for causes of this variation:

1. There may be a mutation in a gene, that produces a new allele
2. The variation may be caused by crossing over/independent segregation during meiosis
3. random fusion of gametes during fertilisation provides different allele combinations
4. The environment may provide differing habitats that allow for natural selection to allow for different characteristics (Environment has an effect as it is polygenic)

Would I need to add more to that?
0
BingTaoBing
Badges: 8
Rep:
?
#2528
Report 6 years ago
#2528
(Original post by reubenkinara)
Think I've done all teh past papers I can. I'm so scared though. I've going to through the textbook for 1.5 hrs then call it a night!
You'll be cool - you've done so much work! I wish I had your motivation
0
ibmb24
Badges: 0
Rep:
?
#2529
Report 6 years ago
#2529
(Original post by MintCrepz)
king
prawn
curry
or
fat
greasy
sausages
Thankyou
0
mo_a.95
Badges: 0
Rep:
?
#2530
Report 6 years ago
#2530
(Original post by ibmb24)
does anyone have a mnemonic for learning the taxonomy groups

King Phillip Came Over For Great Soup
1
MintCrepz
Badges: 0
Rep:
?
#2531
Report 6 years ago
#2531
(Original post by Nav_Mallhi)
Isn't that what the endodermal cells do? They transport salts into the xylem and this lowers the water potential and water moves into the xylem by osmosis.

From the soil to the root hair cells, its osmosis.
This is correct
1
Aspiring Medic 7
Badges: 9
Rep:
?
#2532
Report 6 years ago
#2532
(Original post by mo_a.95)
King Phillip Came Over For Great Soup
King Philip Can Only Find Green Socks.

Posted from TSR Mobile
0
denteddental
Badges: 20
Rep:
?
#2533
Report 6 years ago
#2533
(Original post by VigneshSB)
Say they gave us a species, and told us that they showed varying characteristics, and asked for causes of this variation:

1. There may be a mutation in a gene, that produces a new allele
2. The variation may be caused by crossing over/independent segregation during meiosis
3. random fusion of gametes during fertilisation provides different allele combinations
4. The environment may provide differing habitats that allow for natural selection to allow for different characteristics (Environment has an effect as it is polygenic)

Would I need to add more to that?
I think you've got it all covered.
0
ImAz
Badges: 6
Rep:
?
#2534
Report 6 years ago
#2534
Could anyone sketch a diagram of meiosis for me?
Also the process of cohesion tension?

finding it tough to understand and remember


Posted from TSR Mobile
0
FatHeadedKing
Badges: 0
Rep:
?
#2535
Report 6 years ago
#2535
(Original post by MintCrepz)
Anyone thinking that Meselson-Stahl could come up?

No
0
MintCrepz
Badges: 0
Rep:
?
#2536
Report 6 years ago
#2536
Do cells become haploid in meiosis 1 or 2 ?

cause I thought it was like this:

cell starts with two homologous chromosomes

( X X ) chromosome number 2 - diploid

meiosis 1

( X ) ( X) chromosome number 1? - haploid ?

meiosis 2

(\) (/) (\) (/) Chromosome number 1 - still haploid?
0
WheezyT
Badges: 2
Rep:
?
#2537
Report 6 years ago
#2537
King Penguins Can Only Find Green Shoes,

Good luck guys my head hurts now!
Just look in the questions! With the HSW I've noticed that the answers to the one/two markers are sometimes in the question it self, try make them links!!!!

See you on the other side.
0
FatHeadedKing
Badges: 0
Rep:
?
#2538
Report 6 years ago
#2538
I always forget the name of that topic. You know, the one with the sex rituals in it. :confused:
0
lorobolorolo
Badges: 7
Rep:
?
#2539
Report 6 years ago
#2539
Could someone please help me with question 9 d) of this paper?
How do u work out the percentages?
Attached files
0
ImAz
Badges: 6
Rep:
?
#2540
Report 6 years ago
#2540
(Original post by MintCrepz)
Do cells become haploid in meiosis 1 or 2 ?

cause I thought it was like this:

cell starts with two homologous chromosomes

( X X ) chromosome number 2 - diploid

meiosis 1

( X ) ( X) chromosome number 1? - haploid ?

meiosis 2

(\) (/) (\) (/) Chromosome number 1 - still haploid?
Meiosis 1 is diploid forming 2 diploid.

Meiosis 2 is 2 diploid further splitting to form 4 haploid.


Posted from TSR Mobile
0
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 19 Oct '19
  • Coventry University
    Undergraduate Open Day Undergraduate
    Sat, 19 Oct '19
  • University of Birmingham
    Undergraduate Open Day Undergraduate
    Sat, 19 Oct '19

Why wouldn't you turn to teachers if you were being bullied?

They might tell my parents (11)
6.01%
They might tell the bully (18)
9.84%
I don't think they'd understand (32)
17.49%
It might lead to more bullying (70)
38.25%
There's nothing they could do (52)
28.42%

Watched Threads

View All