B6

Question 1

Sexual reproduction in animals

Answer 1

The joining of male and female gametes (spear and egg)

The offspring has a unique combination of DNA from both parents

Question 2

Advantages of gm crops

Answer 2

Produces cures without animal cruelty 
Increase yield making more food 
People with lack of nutrients benefit e.g. Golden rice with vitamin a to prevent blindness 
Already going without problems
More resistant to diseases

Question 3

Disadvantages of gm crops

Answer 3

May affect number of wild flowers decreasing bio diversity
People think it’s not safe as it’s not fully understood
Transplanted genes may interbreed with other plants and produces weeds like superweeds as it’s not resistant to weed killers

Question 4

Adult cell cloning

Answer 4

Take a body cell of the desired animal and remove the nucleus with an enzyme
We the remove an unfertilised egg cell from the animal that will carry the offspring and remove its nucleus
Place the body cell nucleus into the egg cell and place it back into the womb as an embryo has been formed

Question 5

Sexual reproduction in plants

Answer 5

The joining of pollen and ovule cells in flowering plants

Question 6

Why sexual reproduction produces variation in the offspring but asexual does not

Answer 6

In sexual reproduction there is a mixing of two genetic information one from the mother and one from the father
Asexual involves only one parent therefore there is no mixing of genetic information resulting in identical offspring (clones)

Question 7

What is DNA

Answer 7

(Deoxyribonucleic acid)

It’s a polymer made up of two strands forming a double helix. It is found in chromosomes