10.5 Types of variation

Question 1

what is variation

Answer 1

the difference in characteristics between organisms

Question 2

whats interspecific variations

Answer 2

variation between different species

Question 3

whats intraspecific variation

Answer 3

variation within a species

Question 4

what are two causes of variation

Answer 4

genetic and environmental

Question 5

what are the genetic causes of variation

Answer 5

alleles, mutations, meiosis, sexual reproduction and chance

Question 6

environmental causes of variation

Answer 6

can be affected by climate, diet, culture and lifestyle

Question 7

variation caused by genetics and environmental

Answer 7

most variation is caused by both eg height and skin colour as many characteristics can be affected by both its difficult to draw conclusions about the type of variation for any particular case

Question 8

how do alleles and mutations show genetic variation

Answer 8

alleles
genes have many alleles and depending on the parental combination of alleles the different alleles will be different in different offspring

mutations
changes to the dna sequence leads to changes in proteins and leads to changes in the physical and metabolical characteristics

Question 9

how does meiosis, sexual reproduction and chance show genetic variation

Answer 9

meiosis
gametes are produced by meiosis and each gamete is different due to independant assortment and crossing over

sexual reproduction
offspring are produced from two parents and inherit genes from both its a random combination

chance
chance of which gametes fuse together through fertilisation