Gametes and fertilisation in sexual reproduction | Science

Starter quiz

Where is the genetic information stored in an animal cell?
- 'Nucleus' ✓
Match up the cell to where it is produced.
- sperm
  
  ⇔
  
  testes ✓
- egg
  
  ⇔
  
  ovaries ✓
How long is the gestation period of humans?
- 1 month
- 28 days
- 9 months ✓
- 1 year
Which of these are changes that females go through during puberty?
- voice deepens
- ovaries start to release eggs ✓
- sperm is produced in the testes
- ovaries produce hormones ✓
What is the process of producing offspring?
- 'Reproduction' ✓
What are hormones?
- organs
- chemicals ✓
- tissues
- cells

What are sperm and egg cells known as?
- 'Gametes' ✓
Who is incorrect?
- Izzy: A zygote carries half of the genetic information. ✓
- Andeep: Sperm and egg cells are needed for human reproduction.
- Sam: An egg cell carries all the genetic information of the parents. ✓
Which of these doesn't have 46 chromosomes?
- zygote
- egg cell ✓
- embryo
- foetus
- baby
How many chromosomes will a lion's egg and sperm cells have? A lion's body cell contains 38 chromosomes.
- 38
- 19 ✓
- 0
- 18
- 76
Put the following stages of human development in the right order.
- 1
  
  ⇔
  
  zygote
- 2
  
  ⇔
  
  embryo
- 3
  
  ⇔
  
  foetus
- 4
  
  ⇔
  
  baby
Where does fertilisation take place?
- 'Fallopian tubes' ✓

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Sperm and egg cells are the sex cells of humans and are called gametes.
Humans reproduce through sexual reproduction where half the genetic material of the offspring comes from each parent.
Fertilisation occurs in the fallopian tubes when gametes join to form a zygote.
Each gamete carries half the genetic material of the parent; a zygote has a full set of genetic material.
The zygote divides to form a ball of cells called an embryo, which grows to form a foetus and then a baby.

Fertilisation occurs in the uterus and can happen at any time.

Fertilisation occurs in the fallopian tubes and this can only happen before the egg cell reaches the uterus.

Gametes - The sex cells in humans, which are egg and sperm cells.
Sperm cell - The male gamete.
Egg cell - The female gamete.
Fertilisation - Occurs when a sperm and egg cell fuse together to form a zygote.
Embryo - Formed when a zygote divides to form a ball of cells.