speciation

Question 1

species

Answer 1

A species is one or more populations of individuals that can interbreeding under natural conditions and producing fertile offspring, and are reproductively isolated from other such populations

Question 2

Speciation

Answer 2

the formation of a new species from existing species

Question 3

Macroevolution

Answer 3

Forming of new species

Question 4

Reproductive isolating mechanism

Answer 4

Any heritable feature of body, form, functioning, or behavior that prevents breeding between one or more genetically divergent populations

Question 5

Prezygotic Isolating mechanisms

Answer 5

prevent mating or prevent fertilization

Question 6

Mating prevention

Answer 6

Behavioural - behaviours that prevent other species from recognizing or selecting them for mating
Temporal - Two species that live in the same habitat but have different mating seasons due to varying reproductive cycles
Ecological - two species that live in same general area but in different habitats

Question 7

Fertilization prevention

Answer 7

Mechanical - structural differences in reproductive organs that prevent fertilization.
Gametic - if egg and sperm from 2 different species do happen to meet gametic isolation will ensure that zygote doesn’t form

Question 8

Postzygotic Isolating Mechanisms

Answer 8

prevent hybrid zygotes from becoming viable/fertile
inviability - development of hybrid zygote stops in early development and it dies before birth due to genetic incompatibility which prevents normal mitosis ex. Sheep and goat
Hybrid sterility - Hybrid produced is sterile (cannot produce normal gametes) ex. Horse and donkey can create mule but it can’t reproduce
Hybrid breakdown - Hybrid forms but when these hybrids mate their offspring are weak and sterile