Cell division

Question 1

What Is diploid cells

Answer 1

23 pairs of chromosomes, 46 total, most cells

Question 2

What is halpoid cells

Answer 2

23 single, Gametes

Question 3

What is mitosis

Answer 3

One diploid parent cell makes two genetically identicle daughter cells

Question 4

What are the stages of mitosis

Answer 4

IPMATC, Interphase, Prophase, Metaphase, Anaphase, Telophase, Cytokinesis

Question 5

What is Meiosis

Answer 5

One Parent diploid cell makes four genetically different haploid daughter cells, GAMETES

Question 6

What are the stages on meiosis,

Answer 6

Egg + Sperm = Zygote = Embryo

Question 7

compare the outcomes of mitosis and meiosis

Answer 7

Mitosis produces, identical diploid cells used all around the body, meiosis produces haploid, non-identical gametes

Question 8

Describe features of asexual reproduction

Answer 8

(rapid reproductive cycle, no need for mate, no variation of offspring).

Question 9

Describe features of sexual reproduction

Answer 9

(slower reproductive cycle, requires mate, variation in offspring).

Question 10

What is tissue culture and why is it important

Answer 10

It works with small pieces of plants, called explants These are grown in vitro using sterile agar jelly that contains plant hormones and nutrients. This makes tissue culture more expensive and difficult to do than taking cuttings. This is an important way to preserve rare plant species or grow commercially in larger nurseries.

Question 11

Benefits of genetic engineering

Answer 11

Genetic modification is a faster and more efficient way of getting the same results as selective breeding.
Improve crop yields or crop quality,
Introduce herbicide resistance,
Insect and pest resistance can be developed and inserted into the plants.
Sterile insects could be created such as a mosquito.

Question 12

Risks of genetic engineering

Answer 12

Risks of genetic engineering
Transfer of the selected gene into other species.
Some people believe it is not ethical to interfere with nature in this way.
GM crops could be harmful,
GM crops could cause allergic reactions in people.
Pollen produced by the plants could be toxic and harm insects.

Question 13

Why would a student use the tip of a root when investigating mitosis

Answer 13

Tips contain meristems for growth, and so mitosis will occur in the tip