courtneyr_98
Badges: 0
Rep:
?
#1
Report Thread starter 6 years ago
#1
Variation can be caused by random fertilisation, explain how. (Explain in detail what cells are involved/where from/why does this lead to variation?)
0
reply
username1560589
Badges: 20
Rep:
?
#2
Report 6 years ago
#2
(Original post by courtneyr_98)
Variation can be caused by random fertilisation, explain how. (Explain in detail what cells are involved/where from/why does this lead to variation?)
Gametes are involved. Each gamete is halpoid and has a random half of the genetic information of the parent. A gamete from each parent is randomly chosen and their genetic material is combined in fertilisation.
This ensures that each individual has a different combination of genes, so leads to variation.
0
reply
Pride
Badges: 21
Rep:
?
#3
Report 6 years ago
#3
(Original post by courtneyr_98)
Variation can be caused by random fertilisation, explain how. (Explain in detail what cells are involved/where from/why does this lead to variation?)
There's a number of things that lead to variation that I'm sure you're being taught about in biology. By random fertilisation, I think they mean that the sperm cell that actually ends up fertilising the ovum is 'random'. The man produces many genetically unidentical sperm cells, but only one of them actually takes part in fertilisation. This introduces variation - it's one of the ways that ensure no two humans are genetically identical (except identical twins of course)
0
reply
temporary_user
Badges: 1
Rep:
?
#4
Report 6 years ago
#4
(Original post by morgan8002)
Gametes are involved. Each gamete is halpoid and has a random half of the genetic information of the parent. A gamete from each parent is randomly chosen and their genetic material is combined in fertilisation.
This ensures that each individual has a different combination of genes, so leads to variation.
Disgusting, if an examiner saw this explanation he would burn your paper.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
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

What factors affect your mental health the most right now?

Anxiousness about lockdown easing (147)
4.89%
Uncertainty around my education (443)
14.73%
Uncertainty around my future career prospects (338)
11.24%
Lack of purpose or motivation (419)
13.93%
Lack of support system (eg. teachers, counsellors, delays in care) (140)
4.66%
Impact of lockdown on physical health (181)
6.02%
Loneliness (258)
8.58%
Financial worries (109)
3.62%
Concern about myself or my loves ones getting/having been ill (123)
4.09%
Exposure to negative news/social media (136)
4.52%
Lack of real life entertainment (163)
5.42%
Lack of confidence in making big life decisions (266)
8.85%
Worry about missed opportunities during the pandemic (284)
9.44%

Watched Threads

View All