growth, reproduction and genetics

Question 1

what happens in result of cell division?

Answer 1

tissue and organs grow

Question 2

what is asexual?

Answer 2

when a species can reproduce with only one parent.

Question 3

what is cloning?

Answer 3

production of new individuals that are genetically identical to one another.

Question 4

example of an animal that can clone itself

Answer 4

starfish

Question 5

example of a plant that can clone itslef

Answer 5

potatoes

Question 6

what does sexual reproduction do?

Answer 6

produces a new organism by combining the genes of two organisms

Question 7

what are sex cells called?

Answer 7

gametes

Question 8

what are male gametes called?

Answer 8

sperm

Question 9

what are female gametes called?

Answer 9

egg cells

Question 10

what is fertilisation?

Answer 10

the fusion of gametes to form a zygote

Question 11

what does a zygote do?

Answer 11

goes through cell division to form an embryo

Question 12

what is genetics?

Answer 12

the study of inheritance

Question 13

what are chromosomes?

Answer 13

packages of long threads of DNA, tightly wound up so that can fit inside the nucleus of a cell

Question 14

what is DNA?

Answer 14

the material that contains all the information about how a living thing will look and function.

Question 15

what is a gene?

Answer 15

a section of DNA that codes for a particular protein

Question 16

how many chromosomes are in a human cell?

Answer 16

46

Question 17

how many chromosomes are in the human gamete?

Answer 17

23

Question 18

how many sets of chromosomes does each gamete contribute during fertilisation?

Answer 18

one set of chromosomes

Question 19

how many sets of chromosomes does the zygote contain?

Answer 19

2 sets of 23 chromosomes

Question 20

how many copies of each gene does the body cell have?

Answer 20

2 copies of each gene. one from each parent

Question 21

what is a dominant gene?

Answer 21

a gene that determines the characteristic of the organism