BIO2008: Lecture 8

HideShow resource information
  • Created by: LMoney
  • Created on: 11-05-14 13:04
Which is lower broad (H^2) or narrow (h^2) sense heritability?
narrow sense heritability
1 of 15
which is more useful for predicting evolutionary change, broad or narrow sense heritability?
Narrow sense heritability
2 of 15
what does similarity of related individuals measure?
Are offspring of one mother/family more similar to each other than they are to other random plants/animals?
3 of 15
if character has high h^2 (narrow sense heritability), what does this mean?
character very similar within families, variation is largely found between families?
4 of 15
if character has low h^2, what does this mean?
brothers and sisters not more similar to each other than to anyone else- variation is both within and between families
5 of 15
how can we estimate heritability?
htN (narrow sense heritability) = VA / (VA + VE)- By doing an analysis of variance we can partition the variation due to genetics (family) and due to the environment
6 of 15
What is best experiment to estimate heritability h^2 of flower size in an annual plant, without selecting?
Measure ‘brothers and sisters’ of multiple families
7 of 15
Will the heritability for a particular character (e.g. wing length) be the same for animals from different populations of the same species and why?
No: Strong selection for a particular character lowers additive genetic variation over long term Results in low heritability in particular populations, namely in those where particular character is important (is selected)
8 of 15
would this necessarily affect this character (e.g. wing length)?
No, not necessarily
9 of 15
Is heritability a measure fixed for a certain character across all species?
No
10 of 15
Is there a single heritability of a character in a species?
Not really
11 of 15
Heritability of a character in a specific population?
Better
12 of 15
Do morphological characters or reproductive and life history characters tend to have
Reproductive and life history characters
13 of 15
Are P major and P intermedia two species with little gene flow or 1 species with lots of gene flow?
separate species with little local gene flow
14 of 15
Expect that those from long grass habitats have spikes(blank) than those from mown grass?
longer and straight
15 of 15

Other cards in this set

Card 2

Front

which is more useful for predicting evolutionary change, broad or narrow sense heritability?

Back

Narrow sense heritability

Card 3

Front

what does similarity of related individuals measure?

Back

Preview of the front of card 3

Card 4

Front

if character has high h^2 (narrow sense heritability), what does this mean?

Back

Preview of the front of card 4

Card 5

Front

if character has low h^2, what does this mean?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Lecture 8 resources »