B1.7

Question 1

Cuttings

Answer 1

• cuttings are taken from parent plant, with a bud on
• dip it in hormones
• they’re kept in moist conditions until they’re ready to plant
• a cloned plant is then made

Question 2

Good things about cuttings

Answer 2

• quick

* cheap

Question 3

What is embryo transplant

Answer 3

• sperm cell is taken and egg cell is taken
• the egg is artificially fertilised from the sperm
• the embryo then develops and splits many times
• the cloned embryos can then be planted into other cows

Question 4

The definition of a chromosome

Answer 4

Two Strands of DNA

Question 5

What is a gene?

Answer 5

•short section of chromosomes which contain gene codes

Question 6

Sexual reproduction in animals

Answer 6

• the fusion of male and female gametes

* each gamete contains 23 chromosomes

Question 7

Advantages and disadvantages of asexual reproduction

Answer 7

• advantage: population increase rapidly, only one partner

* disadvantage:doesn’t lead to varied population, species may be only suitable for one habitat

Question 8

Process of tissue culture

Answer 8

• tissue sample is scraped from parent plant
• then placed in agar, containing auxin
• samples grown into tiny plantlets
• plantlets are then composted

Question 9

Good things about tissue culture

Answer 9

• exact clones of parents
• quick
• can be done in little space
• can be grown all year

Question 10

Adult cell cloning (dolly)

Answer 10

• egg cell is removed from sheep A
• the nucleus is then removed
• sheep b has genetic material removed (the one u wanna clone)
• then placed in sheep a empty cell
• they’re fused together with an electric shock
• then develops into embryo
• implanted into sheep c

Question 11

Genetic engineering

Answer 11

• useful gene is cut from the organism chromosomes using enzymes
• enzymes then cut another organisms chromosomes then insert a useful gene

Question 12

What’s an example of genetic engineering

Answer 12

• for diabetes

* human insulin gene can be used to produce a lot of human insulin

Question 13

Cons of gm crops

Answer 13

• will affect the number of weeds and flowers, reducing farmland, and biodiversity
• not everyone thinks it’s save

Question 14

Pros of gm crops

Answer 14

• increase the yield of a crop
• for developing countries could be the nutrients they need
• can be grown anywhere