Lecture 10: Reproduction

Question 1

male and female systems consist of paired _ connected to a median ducky leading to the __

Answer 1

• -gonads
• -gonopore
• –accessory glands are often present

Question 2

only ___ insects are sexually mature BUT

Answer 2

ADULT

but it is important to remember that they are not always active upon imaginal eclosion

Question 3

male system:

Answer 3

a pair set of testes connected to paired seminal vesicles by an ejaculatory duct
-most have accessory glands (usually well developed in species which transfer spermatophores)

Question 4

each testes consists 0f ___ testicular follicles in which spermatogenesis occurs

Answer 4

1-100

Question 5

spermatogenesis: spermatogonium

Answer 5

distal end of the follicle has germ cells (spermatogonium)

Question 6

spermatogenesis: male systems: as the germ cells grow they

Answer 6

push the developing cells down the follicle - therefore there is a range of ages in the follicle

Question 7

spermatogenesis: male system: in general each cell in a cyst is derived from the

Answer 7

same germ cell

Question 8

spermatogenesis: male system: number of sperm per cyst is

Answer 8

2,4,8,16,32,64 etc meiotic division

Question 9

spermatogenesis time lines

Answer 9

varies up to 20 days

Question 10

female system:

Answer 10

pair of ovaries connected to a median oviduct, Genital tract (vagina) also bears bursa copulatrix and spermatheca

Question 11

ovaries consist of a number of

Answer 11

ovarioles

Question 12

spermatheca

Answer 12

where she stores sperm

Question 13

bursa copulatrix

Answer 13

specially adapted part of genital tract

Question 14

oviducts are___ lined tubes

Answer 14

epithelium

Question 15

median oviduct and vagina are ____ lined

Answer 15

cuticle lined

Question 16

oogenesis

Answer 16

• same principle as male system
• but only one cell generated (the egg)
• panoistic ovaries
• polytrophic ovaries
• acrotrophic ovaries

Question 17

all insects have ___ fertilisation, not all have ____

Answer 17

internal fertilisation but not all have copulation

Question 18

primitive insects (apterygotes) deposit a ___ on the ground

Answer 18

spermatophores

Question 19

male pterygote have an

Answer 19

aedeagus - derived from paired appendages on the 9th segments of the abdomen

Question 20

some basal mayflies still have ___ aedeagi

Answer 20

paired

Question 21

male pterygote either transfer a

Answer 21

spermatophore or free sperm

Question 22

spermatophores often have a complex

Answer 22

structure and mode of action

Question 23

females often eat pro tenacious part as a nuptial gift how is this beneficial

Answer 23

female uses protenacious sac for young

-males more likely to be picked if bigger

Question 24

the aedeagus is rarely used JUST for

Answer 24

sperm transfer,

Question 25

dragonflies and aedeagus

Answer 25

modified in dragonflies to first displace rival sperm from the spermaca and then inseminate

Question 26

in bed bugs the aedeagus is modified for

Answer 26

harmocoelic insemination

Question 27

the been weevil aedeagus is modified to

Answer 27

damage genetic tract -sexual conflict

Question 28

oviposition:

Answer 28

when female gonopore is modified into an ovipositor

Question 29

eggs take __

Answer 29

many forms, adapted to oviposition site

Question 30

eggs are fertilised as they are

Answer 30

played

Question 31

fertilisation is therefore under

Answer 31

female control and v fine control too