Part H: Lecture 18

Question 1

mechanisms for sex determination

Answer 1

1) Environmental
2) Single autosomal gene
3) Haplodiploid

Question 2

Environmental sex determination definition

Answer 2

some environmental factor determines sex

Question 3

Environmental sex determination example

Answer 3

egg temperature of sea turtles determines sex (turtles in the middle of nest are male)

Question 4

sea turtles: egg temp- warm?

Answer 4

male turtle

Question 5

sea turtles: egg temp- cool?

Answer 5

female turtle

Question 6

sex turtle male: female ratio

Answer 6

1:1

Question 7

single autosomal gene sex determination example

Answer 7

asparagus and M-gene

Question 8

asparagus and M-gene (male and female)

Answer 8

male: M/m
female: m/m

Question 9

asparagus male: female ratio

Answer 9

1:1

Question 10

Haplodiploid sex determination example

Answer 10

Hymenoptera (bees, wasps, ants)

Question 11

diploid honey bees are ____

Answer 11

female

Question 12

haploid honey bees are ____

Answer 12

male

Question 13

3 types of honey bees

Answer 13

worker female diploid (smallest)
queen female diploid (largest)
drone male haploid

Question 14

honeybees that are fertile

Answer 14

drone (n=16)
queen (2n=32)

Question 15

how queens produce egg

Answer 15

meiosis

Question 16

how drone produce sperm

Answer 16

mitosis

Question 17

most common honey bee

Answer 17

worker female

Question 18

job of worker female

Answer 18

raise young, build hive, get food

Question 19

job of queen female/drone male

Answer 19

reproduction

Question 20

how worker females are made?

Answer 20

most eggs are fertilized= 2n=32 worker females

Question 21

how queen females are made?

Answer 21

some fertilized eggs get royal jelly= 2n=32 queens

Question 22

what is royal jelly

Answer 22

hormones produced by worker bee

Question 23

how drone males are made?

Answer 23

some eggs are not fertilized -> n=16 drone males

Question 24

virgin queens produce ___

Answer 24

drone males

Question 25

ants description

Answer 25

drone male - has wings
female queen - has wings, largest
worker female - no wings

Question 26

X and Y chromosomes sex determination organisms

Answer 26

drosophila + mammals + sago palms

Question 27

mammals that use X and Y sex determination system

Answer 27

placentals, marsupials

Question 28

mammals that don’t use X and Y sex determination system

Answer 28

monotremes

Question 29

haplodiploid system male: female ratio

Answer 29

more female than male

Question 30

X and Y sex determination male: female ratio

Answer 30

1:1

Question 31

Z and W chromosomes sex determination organisms

Answer 31

birds + moths + butterflies

Question 32

X/X is ____

Answer 32

female

Question 33

X/Y is ___

Answer 33

male

Question 34

Z/Z is ___

Answer 34

male

Question 35

Z/W is ____

Answer 35

female

Question 36

Z and W sex determination male: female ratio

Answer 36

1:1

Question 37

clown fish sex determination system

Answer 37

environmental

Question 38

clown fish sex determination system mechanism

Answer 38

-one female (largest) - releases hormones so no more females
-one male (next largest) - releases hormones so no more males
-many undifferentiated fish

Question 39

clown fish: if female dies then ____

Answer 39

male becomes female (replacement)

Question 40

clown fish: if male dies then ___

Answer 40

undifferentiated fish becomes male (replacement)