Reproduction

Question 1

What does sexual production produce?

Answer 1

Genetically different cells

Question 2

What is sexual reproduction?

Answer 2

Where genetic information from two organisms is combined to produce off spring genetically different to either parent

Question 3

What does sexual reproduction require?

Answer 3

A mother and a father they produce gametes

Question 4

In humans how many chromosomes does each gamete contain?

Answer 4

23

Question 5

What is fertilisation

Answer 5

When the egg and the sperm fuse together to form a cell with the full number of chromosomes (46)

Question 6

What do flowers have instead of sperm ?

Answer 6

Pollen

Question 7

What does asexual reproduction produce?

Answer 7

Genetically identical cells

Question 8

What is the off spring of asexual reproduction called ?

Answer 8

A clone

Question 9

What are the differences between asexual and sexual reproduction.?

Answer 9

• sexual = two parents
• asexual = one parent
• sexual =variation
• asexual =clone

Question 10

State the number of chromosomes in a normal human cell?

Answer 10

46

Question 11

How do flowering plants reproduce?

Answer 11

Sexual reproduction

Eggs cells but there sperm is pollen

Question 12

Name the process asexual reproduction uses

Answer 12

Mitosis

Question 13

What is mitosis ?

Answer 13

When an ordinary cell makes a new cell by dividing

Question 14

What asexually reproduces ?

Answer 14

Bacteria

Some plants

Some animals

Question 15

What does sexual reproduction involve ?

Answer 15

The fusion of male and female gametes

Question 16

How are gametes produced ?

Answer 16

Meiosis

Question 17

Where does meiosis happen?

Answer 17

In human reproductive organs

Question 18

What are the human reproductive organs ?

Answer 18

Testes

Ovaries

Question 19

After fertilisation how does the new cell divide ?

Answer 19

Mitosis

To produce an embryo

Question 20

What are the advantages of sexual reproduction?

Answer 20

• variation in the off spring
• variation increases the chance of survival by natural selection
• we can speed natural selection up by humans selective breeding to increase survival

Question 21

What are the advantages of asexual reproduction. ?

Answer 21

• Only one parent
• less energy
• faster
• many identical off spring can be produced in favourable conditions

Question 22

How do mosquitos reproduce ?

Answer 22

Sexually In The mosquito

Asexually in the human host

Question 23

How do fungi reproduce?

Answer 23

Asexually In spores

And sexually to give variation

Question 24

How do plants reproduce?

Answer 24

Produce seeds sexually

Reproduce asexually by runners such as strawberry plants
Or bulb division In daffodils

Question 25

When does fungi reproduce sexually ?

Answer 25

In response to an unfavourable change in the environment

Increases chance of survival

Question 26

Which pair of chromosomes determine the sex?

Answer 26

Number 23

Question 27

What are the sex chromosomes for females ?

Answer 27

XX

Question 28

What are the sex chromosomes for males?

Answer 28

XY

Question 29

What is the probability of a boy at pregnancy?

Answer 29

It’s in a 50:50 ratio

Question 30

How many cell divisions take place in Meiosis?

Answer 30

2

Question 31

What combination of sex chromosomes do females have ?

Answer 31

XX

Question 32

Suggest why there is variation in the offspring of sexual reproduction ?

Answer 32

Because there are two parents, the off spring contain a mixture of their parents genes

This produces variation