Evolution part 2

Question 1

Genetic Drift

Question 2

Non-random Mating

Question 3

Mutation

Question 4

Gene Flow

Question 5

Natural Selection

Question 6

Allopatric Speciation

Question 7

Sympatric Speciation

Question 8

Behavioural Isolation -

Answer 8

Prevention of Mating
Pre-Fertilization
changes to behaviour (e.g. song/mating ritual changes) cause species to stay apart

Question 9

Temporal Isolation -

Answer 9

Prevention of Mating
Pre-Fertilization
changes in timing (e.g. season species is active or diurnal/nocturnal) cause species to stay apart

Question 10

Habitat Isolation

Answer 10

Prevention of Mating
Pre-Fertilization
change in habitat (e.g. preference to dry vs. moist area) causes species to stay apart

Question 11

Mechanical Isolation -

Answer 11

Pre-Fertilization
Prevention of Fertilization
parts (e.g. genitals, body shape) don’t fit, so species prevented from mating

Question 12

Gametic Isolation

Answer 12

Pre-Fertilization
Prevention of Fertilization
the gametes (e.g. sperm/eggs) can’t fuse, preventing fertilization

Question 13

Hybrid Inviability -

Answer 13

Post-Fertilization
Prevention of Hybrids
mating occurs, but embryo aborts/miscarriages before birth

Question 14

Hybrid Sterility

Answer 14

Post-Fertilization
Prevention of Hybrids
mating occurs, but offspring is sterile

Question 15

Hybrid Breakdown

Answer 15

Post-Fertilization
Prevention of Hybrids
mating occurs but offspring can only have offspring with pure species of its parents (F2 generation not viable)

Question 16

Embryology

Answer 16

a branch of science that is related to the formation, growth, and development of embryo

All vertebrates develop first with paired pouches (gills) and “tails”. Fins/Fur/Feathers (often used to classify the vertebrates) appear towards the end of embryo development