Variation - Type + Cause Of Variation

Question 1

What is a species

Answer 1

Organism that have similar morphology to the same group. And can interbreed to produce fertile offspring

Question 2

Class of animal kingdom

Answer 2

Domain
Kingdom
Phylum
Order
Family
Genus
Species

Question 3

Causes of variation in organism

Answer 3

Sexual reproduction
-Chiasma Pro 1
-Independent assortment of homologs Met 1
-IA of sister chromatids Met 2
-Gene from patent
-Mutation

Asexual reproduction
-Mutation

Environmental
-Nutrient
-Epigenetics

Question 4

2 type of variation

Answer 4

Heritable variation
-traits that can pass on to offspring (blood group, height)

Non-heritable variation
-traits that can’t be passed on to offspring and only learnt via environment (chlorosis, ride bike)

Question 5

2 forms of heritable variation

Answer 5

Discontinuous variation
-controlled by single or few gene
-black or white wing colour (no value in between)
-discreet differences

Continuous variation
-controlled by many genes + environment
-height, weight
-has gradual differences in between (how tall you are)

Question 6

Competition for survival

Answer 6

Competition between organism
-for space, food, light, mate
-infraspecific: between same species
-interspecific: between different species

Non-random breeding
-most not breed randomly, has mating ritual
-only those high in hierarchy can breed

Selection pressure
-those with traits better adapted to environment more likely to breed to have offspring that share similar traits