[18.2] variation in phenotype Flashcards

1
Q

what causes variation?

A
  • genetics
  • environment
  • epigenetics
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

how might genetics cause variation?

A
  • mutations
  • meiosis
  • random fertilisation of gametes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

how might environment cause variation?

A
  • food availability
  • prevailing wind can affect direction of tree growth
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the 2 types of variation?

A
  • continuous variation
  • discontinuous variation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

describe continuous variation

A

two extremes and a full range of intermediates

eg. height, weight, length of leaves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what causes continuous variation?

A

the interplay of genetics and environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

describe discontinuous variation

A

2 or more discrete categories with no intermediate values

eg. eye colour, flower colour, blood group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what causes discontinuous variation?

A

alleles of a single gene or a small number of genes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly