Biology- Variation

Variation can be caused by random fertilisation, explain how. (Explain in detail what cells are involved/where from/why does this lead to variation?)

Reply 1

username1560589

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.

Reply 2

Pride

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)