Rep system

Question 1

testes

Answer 1

organs that produce sperm and sex hormones

Question 2

scrotum

Answer 2

pouch of skin containing testes. It hangs outside the body to keep the sperm cooler than normal body temperature.

Question 3

follicles

Answer 3

sacs containing egg cells

Question 4

fallopian tubes

Answer 4

tiny tubes joining the ovaries to the uterus. Fertilization occurs in one of these tubes.

Question 5

fertilization

Answer 5

penetration of the ovum by a sperm

Question 6

sexual reproduction

Answer 6

joining together of male and female reproductive cells

Question 7

gametes

Answer 7

reproductive cells (sperm or ova) containing half the genetic information of normal cells

Question 8

sperm

Answer 8

male reproductive cell. It consists of a head, a middle section and a tail used to swim towards the egg.

Question 9

ova

Answer 9

female gametes or sex cells. Singular = ovum.

Question 10

zygote

Answer 10

cell formed by the fusion of two gametes; fertilised ovum before it starts to divide into more cells

Question 11

external fertilisation

Answer 11

reproduction where the eggs are released by the female into water and fertilised by sperm released nearby

Question 12

internal fertilisation

Answer 12

reproduction where the egg remains in the female and is fertilised by sperm inserted into the female

Question 13

sexual intercourse

Answer 13

act of inserting sperm into the female; also called copulation or mating

Question 14

copulation

Answer 14

the act of inserting sperm into the female; also called sexual intercourse or mating

Question 15

meiosis

Answer 15

cell division process that results in new cells with half the number of chromosomes of the original cell

Question 16

epigenetics

Answer 16

a new branch of science that involves studying the effect of our experiences on the expression of our genetic information

Question 17

nuclear DNA

Answer 17

genetic material passed on from both parents, from the nucleus of both the sperm and the ovum

Question 18

mitochondrial DNA (mtDNA)

Answer 18

genetic material from the mitochondria, passed on only from the mother

Question 19

mtDNA

Answer 19

genetic material from the mitochondria, passed on only from the mother

Question 20

ejaculation

Answer 20

release of sperm

Question 21

semen

Answer 21

combination of fluid and sperm

Question 22

identical twins

Answer 22

twins developed from the same fertilised egg

Question 23

fraternal twins

Answer 23

twins developed from different fertilised eggs