C - Reproduction

Question 1

What are the two different types of reproduction…

Answer 1

• Sexual reproduction

* Asexual reproduction

Question 2

What is sexual reproduction?

Answer 2

Involves the fusion of MALE AND FEMALE GAMETES. Because there are TWO parents, the offspring contains A MIXTURE OF THEIR PARENTS’ GENES.

Question 3

How many chromosomes does the sperm cell contain?

How many chromosomes does the egg cell contain?

Answer 3

They both contain 23 chromosomes each. Therefore the offspring has the mother and fathers genes

Question 4

What is fertilisation?

Answer 4

When the egg and the sperm cell fuse together

Question 5

What does the offspring/fertilised egg contain in terms of chromosomes?

Answer 5

23 chromosomes from the mother and 23 chromosomes from the father

Question 6

What is Asexual reproduction?

Answer 6

When theres only ONE parent. There’s NO fusion of gametes, NO mixing of chromosomes and NO Genetic variation between the parent and the offspring.

Question 7

In Asexual reproduction the offspring are ______ of their parents because their DNA is the same.

Answer 7

Clones

Question 8

How do the cells replicate themselves in animals and humans?

Answer 8

• The cell with the normal full sets of chromosomes
• Each chromosome splits down the middle to form two identical sets of half chromosomes and a membrane forms around them
• The DNA then replicates itself to form two identical cells with complete sets of chromosomes
• This is how we grow and produce REPLACEMENT CELLS

Question 9

Some organisms produce offspring using Asexual production, give an example of one…

Answer 9

Plants, bacteria, sea horses