human/plant reproduction

Question 1

number of chromosomes before divisions

Answer 1

46

Question 2

number if chromosomes after cell divisions in mitosis

Answer 2

46

Question 3

number of divisions in mitosis

Answer 3

1

Question 4

number of daughter cells produced in mitosis

Answer 4

2 - diploid

Question 5

is there genetic variation in mitosis

Answer 5

no

Question 6

example of mitosis

Answer 6

body cells

Question 7

number of parents cells in mitosis

Answer 7

1

Question 8

number of chromosomes after divisions in meiosis

Answer 8

23 in humans (haploid cells)

Question 9

number of divisions in meiosis

Answer 9

2

Question 10

number of daughter cells in meiosis

Answer 10

4

Question 11

number of parent cells in meiosis

Answer 11

2

Question 12

does meiosis produce genetic variation

Answer 12

yes

Question 13

example of meiosis in humans

Answer 13

gametes - ovaries, testes

Question 14

role of placenta

Answer 14

• enables efficient exchange of substances - blood vessels close to placenta to allow fast diffusion
• allows embryo to obtain minerals
• allows embryo to get rid of waste products
• anchors embryo in uterus

Question 15

role of FSH

Answer 15

matures egg, released from pituitary gland

Question 16

role of oestrogen

Answer 16

stimulate uterus lining to thicken, released from ovary

Question 17

role of LH

Answer 17

causes egg to be released from ovary, released from pituitary gland

Question 18

role of progesterone

Answer 18

maintains uterus lining, released from the ovary

Question 19

secondary sexual characteristics in girls

Answer 19

• menstrual cycle
• growth of breasts
• growth of pubic hair
• ‘sexual drive’ develops
• hips widen

Question 20

secondary sexual characteristics in boys

Answer 20

• pubic hair
• muscles develop
• voice deepens
• shoulders broaden
• sperm production