B13 - Reproduction

Question 1

Asexual reproduction

Answer 1

• involves only one parent
• cells divide by mitosis only
  -no fusion of gametes
  -no genetic variation = identical DNA

Question 2

eg of organisms that asexually reproduce

Answer 2

-daffodils
-strawberries
-body cells

Question 3

Sexual reproduction

Answer 3

-involves gametes which fuse to form a zygote
-inherits genetic material from parents = genetic variation

Question 4

gametes are formed by and why

Answer 4

meiosis
-chromosome number is halved

Question 5

plants gametes

Answer 5

egg cells
pollen

Question 6

animals gametes

Answer 6

egg cells and sperm

Question 7

sexual reproduction pros

Answer 7

-offers variation

Question 8

pro of variation

Answer 8

allows long term survival of species
- evolution and adaption

Question 9

meiosis meaning

Answer 9

chromosome number is reduced by half
-so dna is inherited by both parents

Question 10

egs cells made in

Answer 10

ovaries

Question 11

sperm made in

Answer 11

testes

Question 12

process of meiosis

Answer 12

-genetic info is copied = 4 sets of chromosomes
-each chromosome forms a pair of chromatids
-cell divides once so both pairs are split
- cells divide once more so each pair is split = forms 4 gametes w 1 set of chromosomes

Question 13

genetic variation in gametes

Answer 13

-random mixture of original chromosomes
= each are diff

Question 14

fertiliation

Question 15

mitosis to form zygote

Answer 15

-new cell divides
-cells differentiate into tissues/organs

Question 16

alleles

Answer 16

different forms of the same gene

Question 17

pros of asexual

Answer 17

-only 1 parent
-time/energy efficient
-faster
-large number of identical offspring
-goof for fast food production

Question 18

con of asexual

Answer 18

if 1 dies all will as there is no genetic variation to assist with adaptations

Question 19

sexual reproduction pros

Answer 19

-variation
-allows for natural selection

Question 20

pros of selecetive breeding for food

Answer 20

-increase yeild

Question 21

sexual reproduction cons

Answer 21

-requires 2 parents
-slower
-more energy needed

Question 22

asexual in fungi

Answer 22

-common
-fungal spores divide by mitosis

Question 23

sexual in fungi

Answer 23

2 hyphae nuclei fuse to form 1 hypahe
-2 sets of chromosomes
undergoes meiosis = haploid spores

Question 24

pollination

Answer 24

pollen from one flower must reach female parts of another

Question 25

adaptations for pollintaion

Answer 25

-attract animal pollinators to carry pollen by wind

Question 26

fusion of plant gametes

Answer 26

pollen and egg cells = seeds
-variation

Question 27

asexually in plants pro

Answer 27

-new plant is formed even if plant dies

Question 28

con asexually in plants

Answer 28

no variation

Question 29

malaria parasites sexually

Answer 29

-in mosquitoes
-drop in temp triggers this in blood cells

Question 30

malaria parasites sexually process

Answer 30

-20 minute window when
-sexual forms develop and burst out of blood cells
-meet to form zygote
-zygotes undergo meiosis to produce new asexual parasites

Question 31

malaria parasites asexually

Answer 31

in human hosts
-in liver/blood cells